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  1. Article ; Online: Exhaled breath analysis in patients with potentially curative lung cancer undergoing surgery: a longitudinal study.

    Herth, Jonas / Schmidt, Felix / Basler, Sarah / Sievi, Noriane A / Kohler, Malcolm

    Journal of breath research

    2024  Volume 18, Issue 3

    Abstract: Exhaled breath analysis has emerged as a non-invasive and promising method for early detection of lung cancer, offering a novel approach for diagnosis through the identification of specific biomarkers present in a patient's breath. For this longitudinal ... ...

    Abstract Exhaled breath analysis has emerged as a non-invasive and promising method for early detection of lung cancer, offering a novel approach for diagnosis through the identification of specific biomarkers present in a patient's breath. For this longitudinal study, 29 treatment-naive patients with lung cancer were evaluated before and after surgery. Secondary electrospray ionization high-resolution mass spectrometry was used for exhaled breath analysis. Volatile organic compounds with absolute log
    MeSH term(s) Humans ; Breath Tests/methods ; Lung Neoplasms/surgery ; Male ; Female ; Longitudinal Studies ; Aged ; Middle Aged ; Exhalation ; Volatile Organic Compounds/analysis ; Biomarkers, Tumor/analysis
    Language English
    Publishing date 2024-05-17
    Publishing country England
    Document type Journal Article
    ZDB-ID 2381007-5
    ISSN 1752-7163 ; 1752-7155
    ISSN (online) 1752-7163
    ISSN 1752-7155
    DOI 10.1088/1752-7163/ad48a9
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Increasing Daily Physical Activity and Its Effects on QTc Time in Severe to Very Severe COPD: A Secondary Analysis of a Randomised Controlled Trial.

    Kuhn, Manuel / Kohlbrenner, Dario / Sievi, Noriane A / Clarenbach, Christian F

    COPD

    2022  Volume 19, Issue 1, Page(s) 339–344

    Abstract: Approximately, half of COPD patients die from cardiovascular diseases. A prolongation of cardiac repolarization (measured as QTc interval) is associated with cardiovascular events or cardiovascular deaths in populations of older adults and COPD. One way ... ...

    Abstract Approximately, half of COPD patients die from cardiovascular diseases. A prolongation of cardiac repolarization (measured as QTc interval) is associated with cardiovascular events or cardiovascular deaths in populations of older adults and COPD. One way to reduce the QTc could be to increase physical activity (PA). We investigated whether QTc can be reduced by an increase in PA in patients with severe COPD. This is a secondary outcome analysis from a randomized controlled trial investigating the effects of a 3 months pedometer based program to improve PA. 12-lead ECG was assessed at baseline and after 3 months. We measured PA using a validated triaxial accelerometer. Data were analyzed from 59 participants. Multiple regression modeling, including adjustment for baseline QTc, sex, QT prolonging medications, BMI, smoking status and FEV1%, showed no evidence for an association between an improvement of ≥15% PA and QTc reduction. A 15% improvement in PA according to step counts over 3 months seems not to reduce QTc interval by its MCID of 20 ms in patients with severe to very severe COPD.
    MeSH term(s) Actigraphy ; Aged ; Electrocardiography ; Exercise ; Heart ; Humans ; Pulmonary Disease, Chronic Obstructive/complications ; Pulmonary Disease, Chronic Obstructive/therapy
    Language English
    Publishing date 2022-09-26
    Publishing country England
    Document type Journal Article ; Randomized Controlled Trial ; Research Support, Non-U.S. Gov't
    ZDB-ID 2171107-0
    ISSN 1541-2563 ; 1541-2555
    ISSN (online) 1541-2563
    ISSN 1541-2555
    DOI 10.1080/15412555.2022.2101992
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Low-load blood flow restriction strength training in patients with COPD: a randomised single-blind pilot study.

    Kohlbrenner, Dario / Kuhn, Manuel / Manettas, Anastasios / Aregger, Céline / Peterer, Matthias / Greco, Nicola / Sievi, Noriane A / Clarenbach, Christian

    Thorax

    2024  Volume 79, Issue 4, Page(s) 340–348

    Abstract: Objective: The objective of this study is to compare the effectiveness of lower limb low-load blood flow restriction training (LL-BFRT) with high-load strength training (HL-ST) as part of an outpatient pulmonary rehabilitation programme on leg strength ... ...

    Abstract Objective: The objective of this study is to compare the effectiveness of lower limb low-load blood flow restriction training (LL-BFRT) with high-load strength training (HL-ST) as part of an outpatient pulmonary rehabilitation programme on leg strength in patients with chronic obstructive pulmonary disease (COPD).
    Methods: Participants were randomised to LL-BFRT or HL-ST (24 sessions). LL-BFRT was done at 30% 1-repetition maximum (1-RM) with 70% arterial occlusion pressure. HL-ST was done at 70% 1-RM. Primary outcome was isometric strength of knee extensors and flexors. Secondary outcomes were 1-RM, functional exercise capacity, physical activity, symptom burden and health-related quality of life. Perceptions of dyspnoea and leg fatigue were recorded after every exercise. We compared groups with t-tests.
    Results: We included 30 participants (13 women, 17 men, 64 (9) years, forced expiratory volume in 1 s 47 (18)% pred.), 24 completed the study. Isometric knee extensor strength improved to a clinically relevant degree in both legs in both groups (LL-BFRT: right leg 9 (20) Nm, left leg 10 (18) Nm; HL-ST: right leg 15 (26) Nm, left leg 16 (30) Nm, data are mean (SD)), without statistically significant or clinically relevant between-group differences (right leg mean difference= -6.4, 95% CI= -13.20 to 25.92 Nm, left leg mean difference= -5.6, 95% CI= -15.44 to 26.55 Nm). 1 min sit-to-stand test performance improved to a clinically relevant degree only in the LL-BFRT group (4 (4) vs 1 (5) repetitions). Interestingly, physical activity improved to a clinically relevant degree only in the LL-BFRT group (1506 (2441) vs -182 (1971) steps/day). LL-BFRT lowered perceived in-exercise dyspnoea and increased leg fatigue compared with HL-ST in the initial 12 trainings.
    Conclusion: In patients with stable COPD undergoing outpatient pulmonary rehabilitation, LL-BFRT was not superior to HL-ST in improving leg strength. LL-BFRT led to similar strength gains as HL-ST while reducing perceptions of dyspnoea in the initial training phase.
    Trial registration number: NCT04151771.
    MeSH term(s) Male ; Humans ; Female ; Resistance Training ; Pilot Projects ; Quality of Life ; Blood Flow Restriction Therapy ; Single-Blind Method ; Pulmonary Disease, Chronic Obstructive/rehabilitation ; Dyspnea/etiology ; Fatigue ; Muscle Strength
    Language English
    Publishing date 2024-03-15
    Publishing country England
    Document type Randomized Controlled Trial ; Journal Article
    ZDB-ID 204353-1
    ISSN 1468-3296 ; 0040-6376
    ISSN (online) 1468-3296
    ISSN 0040-6376
    DOI 10.1136/thorax-2023-220546
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  4. Article ; Online: Respond to the letter to the editor by Van't Hul et al. regarding the published manuscript "can do, don't do" are not the lazy ones: a longitudinal study on physical functioning in patients with COPD" by Sievi et al.(1).

    Sievi, Noriane A / Kohler, Malcolm / Clarenbach, Christian F

    Respiratory research

    2020  Volume 21, Issue 1, Page(s) 114

    MeSH term(s) Humans ; Longitudinal Studies ; Pulmonary Disease, Chronic Obstructive
    Language English
    Publishing date 2020-05-13
    Publishing country England
    Document type Letter ; Comment
    ZDB-ID 2041675-1
    ISSN 1465-993X ; 1465-9921
    ISSN (online) 1465-993X
    ISSN 1465-9921
    DOI 10.1186/s12931-020-01376-2
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article: Validation of a small cough detector.

    Kuhn, Manuel / Nalbant, Elif / Kohlbrenner, Dario / Alge, Mitja / Kuett, Laura / Arvaji, Alexandra / Sievi, Noriane A / Russi, Erich W / Clarenbach, Christian F

    ERJ open research

    2023  Volume 9, Issue 1

    Abstract: Research question: The assessment of cough frequency in clinical practice relies predominantly on the patient's history. Currently, objective evaluation of cough is feasible with bulky equipment during a brief time (: Methods: We recorded cough ... ...

    Abstract Research question: The assessment of cough frequency in clinical practice relies predominantly on the patient's history. Currently, objective evaluation of cough is feasible with bulky equipment during a brief time (
    Methods: We recorded cough epochs with SIVA-P3 over eight consecutive days in patients suffering from chronic cough. During the first 24 h, the detector was validated against cough events counted by trained human listeners. The wearing comfort and the device usage were assessed using a questionnaire.
    Results: In total, 27 participants (mean±sd age 50±14 years) with either chronic unexplained cough (n=12), COPD (n=4), asthma (n=5) or interstitial lung disease (n=6) were studied. During the daytime, the sensitivity of SIVA-P3 cough detection was 88.5±2.49% and the specificity was 99.97±0.01%. During the night-time, the sensitivity was 84.15±5.04% and the specificity was 99.97±0.02%. The wearing comfort and usage of the device was rated as very high by most participants.
    Conclusion: SIVA-P3 enables automatic continuous cough monitoring in an outpatient setting for objective assessment of cough over days and weeks. It shows comparable sensitivity or higher sensitivity than other devices with fully automatic cough counting. Thanks to its wearing comfort and the high performance for cough detection, it has the potential for being used in routine clinical practice.
    Language English
    Publishing date 2023-01-23
    Publishing country England
    Document type Journal Article
    ZDB-ID 2827830-6
    ISSN 2312-0541
    ISSN 2312-0541
    DOI 10.1183/23120541.00279-2022
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  6. Article: Physical Health-Related Quality of Life Improves over Time in Post-COVID-19 Patients: An Exploratory Prospective Study.

    Malesevic, Stefan / Sievi, Noriane A / Schmidt, Dörthe / Vallelian, Florence / Jelcic, Ilijas / Kohler, Malcolm / Clarenbach, Christian F

    Journal of clinical medicine

    2023  Volume 12, Issue 12

    Abstract: 1) Background: Ongoing symptoms after mild or moderate acute coronavirus disease 19 (COVID-19) substantially affect health-related quality of life (HRQoL). However, follow-up data on HRQoL are scarce. We characterized the change in HRQoL over time in ... ...

    Abstract (1) Background: Ongoing symptoms after mild or moderate acute coronavirus disease 19 (COVID-19) substantially affect health-related quality of life (HRQoL). However, follow-up data on HRQoL are scarce. We characterized the change in HRQoL over time in post-COVID-19 patients who initially suffered from mild or moderate acute COVID-19 without hospitalization. (2) Methods: Outpatients who visited an interdisciplinary post-COVID-19 consultation at the University Hospital Zurich and suffered from ongoing symptoms after acute COVID-19 were included in this observational study. HRQoL was assessed using established questionnaires. Six months after baseline, the same questionnaires and a self-constructed questionnaire about the COVID-19 vaccination were distributed. (3) Results: In total, 69 patients completed the follow-up, of whom 55 (80%) were female. The mean (SD) age was 44 (12) years and the median (IQR) time from symptom onset to completing the follow-up was 326 (300, 391) days. The majority of patients significantly improved in EQ-5D-5L health dimensions of mobility, usual activities, pain and anxiety. Furthermore, according to the SF-36, patients showed clinically relevant improvements in physical health, whereas no significant change was found regarding mental health. (4) Conclusions: Physical aspects of HRQoL in post-COVID-19 patients relevantly improved over 6 months. Future studies are needed to focus on potential predictors that allow for establishing individual care and early interventions.
    Language English
    Publishing date 2023-06-15
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2662592-1
    ISSN 2077-0383
    ISSN 2077-0383
    DOI 10.3390/jcm12124077
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  7. Article ; Online: The effect of longitudinal sleep monitoring on clinician agreement in obstructive sleep apnea diagnosis: The ELSA study.

    Roeder, Maurice / Sievi, Noriane A / Frei, Nina / Schwarz, Esther I / Steinack, Carolin / Gaisl, Thomas / Kohler, Malcolm

    Journal of sleep research

    2023  Volume 33, Issue 2, Page(s) e13943

    Abstract: There is strong evidence for clinically relevant night-to-night variability of respiratory events in patients with suspected obstructive sleep apnea. Sleep experts retrospectively evaluated diagnostic data in 56 patients with suspected obstructive sleep ... ...

    Abstract There is strong evidence for clinically relevant night-to-night variability of respiratory events in patients with suspected obstructive sleep apnea. Sleep experts retrospectively evaluated diagnostic data in 56 patients with suspected obstructive sleep apnea. Experts were blinded to the fact that they were diagnosing the same case twice, once based on a short report of a single in-laboratory respiratory polygraphy and once with the additional information of 14 nights of pulse oximetry at home. All experts (n = 22) were highly qualified, 13 experts (59.1%) treated > 100 patients with suspected obstructive sleep apnea per year. In 12 patients, the apnea-hypopnea index in the respiratory polygraphy was < 5 per hr, but the mean oxygen desaturation index of 14 nights of pulse oximetry was ≥ 5 per hr. The additional information of 14 nights of pulse oximetry helped to diagnose obstructive sleep apnea with a 70% consensus in two of those patients (16.7% [95% confidence interval: 4.7/44.8]). In eight patients, experts could not agree to a 70% consensus regarding continuous positive airway pressure therapy recommendation after respiratory polygraphy. The additional information of multiple-night testing led to a consensus in three of those cases (37.5% [95% confidence interval: 14/69]). Change of obstructive sleep apnea diagnosis and continuous positive airway pressure recommendation was significantly negatively associated with the number of treated obstructive sleep apnea patients > 100 per year compared with 0-29 patients per year (Coef. [95% confidence interval] -0.63 [-1.22/-0.04] and -0.61 [-1.07/-0.15], respectively). Experts found already a high level of consensus regarding obstructive sleep apnea diagnosis, severity and continuous positive airway pressure recommendation after a single respiratory polygraphy. However, longitudinal sleep monitoring could help increase consensus in selected patients with diagnostic uncertainty.
    MeSH term(s) Humans ; Polysomnography ; Retrospective Studies ; Sleep Apnea, Obstructive/diagnosis ; Sleep Apnea, Obstructive/therapy ; Sleep ; Oximetry
    Language English
    Publishing date 2023-05-17
    Publishing country England
    Document type Journal Article
    ZDB-ID 1122722-9
    ISSN 1365-2869 ; 0962-1105
    ISSN (online) 1365-2869
    ISSN 0962-1105
    DOI 10.1111/jsr.13943
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  8. Article ; Online: Predictors of changes in subjective daytime sleepiness in response to CPAP therapy withdrawal in OSA: A post-hoc analysis.

    Roeder, Maurice / Sievi, Noriane A / Kohler, Malcolm / Schwarz, Esther I

    Journal of sleep research

    2020  Volume 30, Issue 2, Page(s) e13078

    Abstract: Subjective sleepiness is the hallmark symptom of untreated obstructive sleep apnea (OSA) and leads to an increased risk of motor vehicle accidents and impaired quality of life. Continuous positive airway pressure (CPAP) is the standard therapy for OSA ... ...

    Abstract Subjective sleepiness is the hallmark symptom of untreated obstructive sleep apnea (OSA) and leads to an increased risk of motor vehicle accidents and impaired quality of life. Continuous positive airway pressure (CPAP) is the standard therapy for OSA and improves sleepiness. The aim was to identify factors that might predict recurrence of sleepiness in times off CPAP and to define OSA patient types with a likely effect of CPAP on sleepiness. A post-hoc analysis of six clinical trials, including 132 patients with OSA effectively treated with CPAP prior to study inclusion, who were allocated to 2 weeks of CPAP withdrawal, was conducted to assess predictors of a change in subjective sleepiness. A multivariate regression model was used to assess predictors of a change in the Epworth Sleepiness Scale (ESS) score. In response to CPAP withdrawal, the median apnea-hypopnea index (AHI) and the ESS score significantly increased compared to baseline on CPAP by 32.6/hr (95% CI, 28.8, 36.4)/hr and 2.5 (95% CI, 1.8,3.2), respectively (p < .001), in the included 132 patients. There was an independent positive association of AHI (Coef. [95% CI] 0.04 [0.01, 0.08]) with an increase in ESS score upon CPAP withdrawal, and an independent negative association of age (coef. [95% CI], -0.10 [-0.18, -0.2]), ESS on CPAP (coef. [95% CI], -0.21 [-0.40, -0.015]) and active smoking status (coef. [95% CI], -1.22 [-2.26, -0.17]). These findings suggest that younger patients with a low residual sleepiness on CPAP and a recurrence of more severe OSA during CPAP withdrawal are at highest risk of suffering from a clinically relevant return of daytime sleepiness in times off CPAP.
    MeSH term(s) Aged ; Continuous Positive Airway Pressure/methods ; Disorders of Excessive Somnolence/complications ; Female ; Humans ; Male ; Middle Aged ; Quality of Life/psychology ; Sleep Apnea, Obstructive/physiopathology
    Language English
    Publishing date 2020-05-22
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 1122722-9
    ISSN 1365-2869 ; 0962-1105
    ISSN (online) 1365-2869
    ISSN 0962-1105
    DOI 10.1111/jsr.13078
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  9. Article ; Online: Blood-Flow-Restricted Strength Training Combined With High-Load Strength and Endurance Training in Pulmonary Rehabilitation for COPD: A Case Report.

    Kohlbrenner, Dario / Aregger, Céline / Osswald, Martin / Sievi, Noriane A / Clarenbach, Christian F

    Physical therapy

    2021  Volume 101, Issue 6

    Abstract: Objective: The purpose of this report is to describe the case of a patient with chronic obstructive pulmonary disease (COPD) who was load compromised and being referred for outpatient pulmonary rehabilitation. Low-load blood flow restriction strength ... ...

    Abstract Objective: The purpose of this report is to describe the case of a patient with chronic obstructive pulmonary disease (COPD) who was load compromised and being referred for outpatient pulmonary rehabilitation. Low-load blood flow restriction strength training (LL-BFRT) was applied to prepare for and increase tolerability of subsequently applied high-load strength training.
    Methods (case description): A 62-year-old woman with COPD GOLD 2 B presented with severe breathlessness. Lower limb strength was severely reduced while functional exercise capacity was preserved. The patient was severely load compromised and had high risk to be intolerant of the high training loads required to trigger the desired adaptations. LL-BFRT was applied during the first 12 training sessions and high-load strength training in the subsequent 12 training sessions of the rehabilitation program. Endurance training on a cycle ergometer was performed throughout the program.
    Results: Symptom burden in the COPD assessment test was reduced by 6 points (40%). Lower limb strength improved by 95.3 Nm (521%) and 88.4 Nm (433%) for the knee extensors and by 33.8 Nm (95%) and 56 Nm (184%) for the knee flexors, respectively. Functional exercise capacity improved by 44 m (11%) in the 6-minute walk test and 14 repetitions (108%) in the 1-minute sit-to stand test. The patient did not experience any adverse events related to the exercise training.
    Conclusion: Clinically relevant changes were observed in both strength-related functional and self-reported outcomes. The achievements translated well into daily living and enabled functioning according to the patients' desires. LL-BFRT was reported to be well tolerated and implementable into an outpatient pulmonary rehabilitation program.
    Impact: The description of this case encourages the systematic investigation of LL-BFRT in COPD. LL-BFRT has the potential to increase benefits as well as tolerability of strength training in pulmonary rehabilitation. Consideration of the physiological changes achieved through LL-BFRT highlights potential in targeting peripheral muscle dysfunction in COPD.
    MeSH term(s) Constriction ; Endurance Training/methods ; Female ; Humans ; Lower Extremity/blood supply ; Middle Aged ; Pulmonary Disease, Chronic Obstructive/rehabilitation ; Regional Blood Flow/physiology ; Resistance Training/methods ; Tourniquets ; Walk Test
    Language English
    Publishing date 2021-02-13
    Publishing country United States
    Document type Case Reports ; Journal Article
    ZDB-ID 415886-6
    ISSN 1538-6724 ; 0031-9023
    ISSN (online) 1538-6724
    ISSN 0031-9023
    DOI 10.1093/ptj/pzab063
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  10. Article ; Online: The prevalence of obstructive sleep apnea in sarcoidosis and its impact on sleepiness, fatigue, and sleep-associated quality of life: a cross-sectional study with matched controls (the OSASA study).

    Roeder, Maurice / Sievi, Noriane A / Schneider, Alexandra / Osswald, Martin / Malesevic, Stefan / Kolios, Antonios / Nilsson, Jakob / Kohler, Malcolm / Franzen, Daniel

    Journal of clinical sleep medicine : JCSM : official publication of the American Academy of Sleep Medicine

    2022  Volume 18, Issue 10, Page(s) 2415–2422

    Abstract: Study objectives: Patients with sarcoidosis experience fatigue and excessive daytime sleepiness (EDS). However, the underlying pathomechanism is unclear. Studies suggested undiagnosed obstructive sleep apnea (OSA) to be an important contributor, but ... ...

    Abstract Study objectives: Patients with sarcoidosis experience fatigue and excessive daytime sleepiness (EDS). However, the underlying pathomechanism is unclear. Studies suggested undiagnosed obstructive sleep apnea (OSA) to be an important contributor, but reliable data on prevalence and impact of OSA in sarcoidosis are scarce.
    Methods: 71 adult patients with sarcoidosis, 1-to-1 matched to 71 adult controls according to sex, age, and body mass index were included. Participants underwent structured interviews (including Epworth Sleepiness Scale [ESS], Fatigue Assessment Scale [FAS], and Functional Outcome of Sleep Questionnaire [FOSQ-30]) and level-3 respiratory polygraphy. OSA was defined as apnea-hypopnea index ≥ 5 events/h. Prevalence of OSA was assessed and possible risk factors for OSA in sarcoidosis were investigated.
    Results: Mild OSA (AHI ≥ 5 events/h) was prevalent in 32 (45%) sarcoidosis patients vs 22 (31%) controls (
    Conclusions: The risk for mild OSA is 2.5-fold higher in sarcoidosis patients compared with matched controls. OSA seems not to be the reason for increased sleepiness or fatigue in sarcoidosis. Risk factors such as body mass index, sex, neck circumference, and NoSAS score can be used to screen for OSA in sarcoidosis patients.
    Clinical trial registration: Registry: ClinicalTrials.gov; Name: Obstructive Sleep Apnoea in Sarcoidosis (OSASA); URL: https://clinicaltrials.gov/ct2/history/NCT04156789?V_2=View; Identifier: NCT04156789.
    Citation: Roeder M, Sievi NA, Schneider A, et al. The prevalence of obstructive sleep apnea in sarcoidosis and its impact on sleepiness, fatigue, and sleep-associated quality of life: a cross-sectional study with matched controls (the OSASA study).
    MeSH term(s) Adult ; Cross-Sectional Studies ; Disorders of Excessive Somnolence/diagnosis ; Fatigue/complications ; Humans ; Prevalence ; Quality of Life ; Sarcoidosis/complications ; Sarcoidosis/epidemiology ; Sleep ; Sleep Apnea, Obstructive/complications ; Sleep Apnea, Obstructive/diagnosis ; Sleep Apnea, Obstructive/epidemiology ; Sleepiness
    Language English
    Publishing date 2022-07-16
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2397213-0
    ISSN 1550-9397 ; 1550-9389
    ISSN (online) 1550-9397
    ISSN 1550-9389
    DOI 10.5664/jcsm.10140
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