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  1. Article: [Frontiers in Live Bone Imaging Researches. In vivo imaging of immune tissues].

    Okada, Takaharu

    Clinical calcium

    2015  Volume 25, Issue 6, Page(s) 853–858

    Abstract: In vivo imaging analysis of the immune tissues, especially secondary lymphoid tissues such as lymph nodes, has greatly increased our understanding of how immune responses are promoted and regulated by immune cell trafficking. Recently, in vivo tracking ... ...

    Abstract In vivo imaging analysis of the immune tissues, especially secondary lymphoid tissues such as lymph nodes, has greatly increased our understanding of how immune responses are promoted and regulated by immune cell trafficking. Recently, in vivo tracking of follicular helper T (Tfh) cells, a vital T cell subset for B cell responses to produce antibodies, by imaging analysis and light-induced cell labeling not only revealed their migration dynamics, but also provided new insights into how Tfh cells may be involved in the generation of immunological memory.
    MeSH term(s) B-Lymphocytes/immunology ; B-Lymphocytes/ultrastructure ; Cell Movement ; Humans ; Immune System/cytology ; Immune System/immunology ; Immunologic Memory/immunology ; Microscopy, Fluorescence, Multiphoton ; Molecular Imaging/methods ; Molecular Imaging/trends ; Receptors, Lysosphingolipid/physiology ; T-Lymphocytes, Helper-Inducer/immunology ; T-Lymphocytes, Helper-Inducer/ultrastructure
    Chemical Substances Receptors, Lysosphingolipid ; S1PR2 protein, human
    Language Japanese
    Publishing date 2015-06
    Publishing country Japan
    Document type English Abstract ; Journal Article ; Review
    ZDB-ID 2386417-5
    ISSN 0917-5857
    ISSN 0917-5857
    DOI CliCa1506853858
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Mechanistic insights into glenohumeral kinematics derived from positional relationship between the contact path and humeral tuberosity.

    Sahara, Wataru / Yamazaki, Takaharu / Inui, Tetsuya / Hanai, Hiroto / Konda, Shoji / Okada, Seiji

    Journal of biomechanics

    2023  Volume 147, Page(s) 111461

    Abstract: Although three-dimensional (3D) glenohumeral (GH) motion has generally been expressed only by rotational elements, its mechanistic details, including GH rotations, remain unknown owing to a lack of geometric investigations. This study aims to investigate ...

    Abstract Although three-dimensional (3D) glenohumeral (GH) motion has generally been expressed only by rotational elements, its mechanistic details, including GH rotations, remain unknown owing to a lack of geometric investigations. This study aims to investigate the positional relationship between the contact path and humeral tuberosities at the GH joint during arm elevation and to consider the mechanism of GH kinematics. Shoulder kinematics were captured using two-dimensional and 3D single-plane image registration techniques in 15 young healthy subjects during flexion, scaption, and abduction. The glenoid movement relative to the humeral head was calculated to describe the contact path on the humeral head. From the start to 45° of flexion, scaption, and abduction, the glenoid center moved from the anteromedial to the anterior, central, and posterior portions of the humeral head, respectively, as the GH joint rotated externally. From 45° to the maximal elevation for all elevation planes, the glenoid center moved upward to the humeral head and came close to the bicipital groove (BG) at maximal elevation, while the glenoid maintained a constant inclination at 20°-40° relative to the humerus. To investigate this mechanism, the position of humeral tuberosities relative to the glenoid was calculated, and the BG was found to face the supraglenoid tubercle, the attachment site of the long head of biceps (LHB). GH external rotation mainly occurred depending on the elevation planes in the early phase of elevation, and it might be kept constant by the LHB and rotator cuff in the mid- to end range of elevation.
    MeSH term(s) Humans ; Biomechanical Phenomena ; Humerus ; Shoulder Joint ; Rotator Cuff ; Scapula ; Range of Motion, Articular
    Language English
    Publishing date 2023-01-21
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 218076-5
    ISSN 1873-2380 ; 0021-9290
    ISSN (online) 1873-2380
    ISSN 0021-9290
    DOI 10.1016/j.jbiomech.2023.111461
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Primary germinal center-resident T follicular helper cells are a physiologically distinct subset of CXCR5

    Yeh, Chen-Hao / Finney, Joel / Okada, Takaharu / Kurosaki, Tomohiro / Kelsoe, Garnett

    Immunity

    2022  Volume 55, Issue 2, Page(s) 272–289.e7

    Abstract: T follicular helper (Tfh) cells are defined by a ... ...

    Abstract T follicular helper (Tfh) cells are defined by a Bcl6
    MeSH term(s) Animals ; B-Lymphocytes/immunology ; B-Lymphocytes/metabolism ; Cell Communication/immunology ; Cell Differentiation ; Cell Proliferation ; Dendritic Cells/immunology ; Gene Expression Profiling ; Germinal Center/immunology ; Histocompatibility Antigens Class II/metabolism ; Mice ; Programmed Cell Death 1 Receptor/metabolism ; Receptors, Antigen, T-Cell/metabolism ; Receptors, CXCR5/metabolism ; Sphingosine-1-Phosphate Receptors/metabolism ; T Follicular Helper Cells/immunology ; T Follicular Helper Cells/metabolism ; T-Lymphocyte Subsets/immunology ; T-Lymphocyte Subsets/metabolism ; Thy-1 Antigens/metabolism
    Chemical Substances CXCR5 protein, mouse ; Histocompatibility Antigens Class II ; Pdcd1 protein, mouse ; Programmed Cell Death 1 Receptor ; Receptors, Antigen, T-Cell ; Receptors, CXCR5 ; Sphingosine-1-Phosphate Receptors ; Thy-1 Antigens ; sphingosine-1-phosphate receptor-2, mouse
    Language English
    Publishing date 2022-01-25
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't
    ZDB-ID 1217235-2
    ISSN 1097-4180 ; 1074-7613
    ISSN (online) 1097-4180
    ISSN 1074-7613
    DOI 10.1016/j.immuni.2021.12.015
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Two-photon microscopy analysis of leukocyte trafficking and motility.

    Okada, Takaharu

    Seminars in immunopathology

    2010  Volume 32, Issue 3, Page(s) 215–225

    Abstract: During the last several years, live tissue imaging, in particular using two-photon laser microscopy, has advanced our understanding of leukocyte trafficking mechanisms. Studies using this technique are revealing distinct molecular requirements for ... ...

    Abstract During the last several years, live tissue imaging, in particular using two-photon laser microscopy, has advanced our understanding of leukocyte trafficking mechanisms. Studies using this technique are revealing distinct molecular requirements for leukocyte migration in different tissue environments. Also emerging from the studies are the ingenious infrastructures for leukocyte trafficking, which are produced by stromal cells. This review summarizes the recent imaging studies that provided novel mechanistic insights into in vivo leukocyte migration essential for immunosurveillance.
    MeSH term(s) Animals ; Cell Movement/immunology ; Cell Movement/physiology ; Chemotaxis, Leukocyte/physiology ; Cytoskeletal Proteins/metabolism ; Humans ; Hyaluronan Receptors/metabolism ; In Vitro Techniques ; Integrins/physiology ; Leukocytes/immunology ; Leukocytes/physiology ; Lymphocytes/physiology ; Microscopy, Fluorescence, Multiphoton/methods ; Models, Biological ; Monomeric GTP-Binding Proteins/metabolism ; Receptors, Chemokine/metabolism ; Receptors, G-Protein-Coupled/metabolism ; Time-Lapse Imaging/methods ; Tissue Scaffolds
    Chemical Substances Cytoskeletal Proteins ; Hyaluronan Receptors ; Integrins ; Receptors, Chemokine ; Receptors, G-Protein-Coupled ; Monomeric GTP-Binding Proteins (EC 3.6.5.2)
    Language English
    Publishing date 2010-07-06
    Publishing country Germany
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Review
    ZDB-ID 2316828-6
    ISSN 1863-2300 ; 1863-2297
    ISSN (online) 1863-2300
    ISSN 1863-2297
    DOI 10.1007/s00281-010-0210-3
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article: Synthesis of (±)-5-epi-Vetiverianine A via an Oxidative Cyclization Approach

    Nagata, Eiji / Sakate, Hisaaki / Okada, Takaharu / Adachi, Shinya / Kamo, Shogo / Matsuzawa, Akinobu / Sugita, Kazuyuki

    Synthesis

    2022  Volume 55, Issue 04, Page(s) 663–669

    Abstract: In this article, we report the synthesis of (±)-5- epi -vetiverianine A. The key reactions, including a rhodium-catalyzed coupling reaction and an oxidative phenolic cyclization, allow for efficient and stereoselective access to (±)-5- epi -vetiverianine ...

    Abstract In this article, we report the synthesis of (±)-5- epi -vetiverianine A. The key reactions, including a rhodium-catalyzed coupling reaction and an oxidative phenolic cyclization, allow for efficient and stereoselective access to (±)-5- epi -vetiverianine A in 11 steps, and in 20% overall yield. The stereochemistry is confirmed by NOE studies.
    Keywords synthetic study ; vetiverianine A ; 5- ; -vetiverianine A ; oxidative cyclization ; Rh-catalyzed coupling
    Language English
    Publishing date 2022-09-20
    Publisher Georg Thieme Verlag KG
    Publishing place Stuttgart ; New York
    Document type Article
    ZDB-ID 2033062-5
    ISSN 1437-210X ; 0039-7881
    ISSN (online) 1437-210X
    ISSN 0039-7881
    DOI 10.1055/a-1947-6049
    Database Thieme publisher's database

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  6. Article ; Online: The WATCH-DM risk score estimates clinical outcomes in type 2 diabetic patients with heart failure with preserved ejection fraction.

    Iwakura, Katsuomi / Onishi, Toshinari / Okamura, Atsunori / Koyama, Yasushi / Tanaka, Nobuaki / Okada, Masato / Fujii, Kenshi / Seo, Masahiro / Yamada, Takahisa / Yano, Masamichi / Hayashi, Takaharu / Yasumura, Yoshio / Nakagawa, Yusuke / Tamaki, Shunsuke / Nakagawa, Akito / Sotomi, Yohei / Hikoso, Shungo / Nakatani, Daisaku / Sakata, Yasushi

    Scientific reports

    2024  Volume 14, Issue 1, Page(s) 1746

    Abstract: The coexistence of heart failure is frequent and associated with higher mortality in patients with type 2 diabetes (T2DM), and its management is a critical issue. The WATCH-DM risk score is a tool to predict heart failure in patients with type 2 diabetes ...

    Abstract The coexistence of heart failure is frequent and associated with higher mortality in patients with type 2 diabetes (T2DM), and its management is a critical issue. The WATCH-DM risk score is a tool to predict heart failure in patients with type 2 diabetes mellitus (T2DM). We investigated whether it could estimate outcomes in T2DM patients with heart failure with preserved ejection fraction (HFpEF). The WATCH-DM risk score was calculated in 418 patients with T2DM hospitalized for HFpEF (male 49.5%, age 80 ± 9 years, HbA1c 6.8 ± 1.0%), and they were divided into the "average or lower" (≤ 10 points), "high" (11-13 points) and "very high" (≥ 14 points) risk groups. We followed patients to observe all-cause death for 386 days (median). We compared the area under the curve (AUC) of the WATCH-DM score for predicting 1-year mortality with that of the Meta-Analysis Global Group in Chronic Heart Failure (MAGGIC) score and of the Barcelona Bio-Heart Failure Risk (BCN Bio-HF). Among the study patients, 108 patients (25.8%) had average or lower risk scores, 147 patients (35.2%) had high risk scores, and 163 patients (39.0%) had very high risk scores. The Cox proportional hazard model selected the WATCH-DM score as an independent predictor of all-cause death (HR per unit 1.10, 95% CI 1.03 to 1.19), and the "average or lower" risk group had lower mortality than the other groups (p = 0.047 by log-rank test). The AUC of the WATCH-DM for 1-year mortality was 0.64 (95% CI 0.45 to 0.74), which was not different from that of the MAGGIC score (0.72, 95% CI 0.63 to 0.80, p = 0.08) or that of BCN Bio-HF (0.70, 0.61 to 0.80, p = 0.25). The WATCH-DM risk score can estimate prognosis in T2DM patients with HFpEF and can identify patients at higher risk of mortality.
    MeSH term(s) Humans ; Male ; Aged ; Aged, 80 and over ; Diabetes Mellitus, Type 2/complications ; Stroke Volume ; Heart Failure ; Risk Factors ; Prognosis
    Language English
    Publishing date 2024-01-19
    Publishing country England
    Document type Meta-Analysis ; Journal Article
    ZDB-ID 2615211-3
    ISSN 2045-2322 ; 2045-2322
    ISSN (online) 2045-2322
    ISSN 2045-2322
    DOI 10.1038/s41598-024-52101-8
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: An Ionizable Lipid Material with a Vitamin E Scaffold as an mRNA Vaccine Platform for Efficient Cytotoxic T Cell Responses.

    Oyama, Ryotaro / Ishigame, Harumichi / Tanaka, Hiroki / Tateshita, Naho / Itazawa, Moeko / Imai, Ryosuke / Nishiumi, Naomasa / Kishikawa, Jun-Ichi / Kato, Takayuki / Anindita, Jessica / Nishikawa, Yoshifumi / Maeki, Masatoshi / Tokeshi, Manabu / Tange, Kota / Nakai, Yuta / Sakurai, Yu / Okada, Takaharu / Akita, Hidetaka

    ACS nano

    2023  Volume 17, Issue 19, Page(s) 18758–18774

    Abstract: RNA vaccines based on lipid nanoparticles (LNPs) ... ...

    Abstract RNA vaccines based on lipid nanoparticles (LNPs) with
    MeSH term(s) Animals ; Mice ; T-Lymphocytes, Cytotoxic ; CD8-Positive T-Lymphocytes ; Vitamin E/pharmacology ; Vaccines, Synthetic ; mRNA Vaccines ; Antigens ; Ovalbumin ; Nanoparticles ; RNA, Messenger/genetics ; Lipids/pharmacology ; Mice, Inbred C57BL ; Dendritic Cells
    Chemical Substances Vitamin E (1406-18-4) ; Vaccines, Synthetic ; mRNA Vaccines ; Antigens ; Ovalbumin (9006-59-1) ; RNA, Messenger ; Lipids
    Language English
    Publishing date 2023-09-26
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ISSN 1936-086X
    ISSN (online) 1936-086X
    DOI 10.1021/acsnano.3c02251
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Sensory neuronal STAT3 is critical for IL-31 receptor expression and inflammatory itch.

    Takahashi, Sonoko / Ochiai, Sotaro / Jin, Jianshi / Takahashi, Noriko / Toshima, Susumu / Ishigame, Harumichi / Kabashima, Kenji / Kubo, Masato / Nakayama, Manabu / Shiroguchi, Katsuyuki / Okada, Takaharu

    Cell reports

    2023  Volume 42, Issue 12, Page(s) 113433

    Abstract: IL-31 receptor blockade suppresses pruritus of atopic dermatitis. However, cell-type-specific contributions of IL-31 receptor to itch, its expression mechanism, and the downstream signaling pathway to induce itch remain unknown. Here, using conditional ... ...

    Abstract IL-31 receptor blockade suppresses pruritus of atopic dermatitis. However, cell-type-specific contributions of IL-31 receptor to itch, its expression mechanism, and the downstream signaling pathway to induce itch remain unknown. Here, using conditional knockout mice, we demonstrate that IL-31-induced itch requires sensory neuronal IL-31 receptor and STAT3. We find that IL-31 receptor expression is dependent on STAT3 in sensory neurons. In addition, pharmacological experiments suggest that STAT3 activation is important for the itch-inducing signaling downstream of the IL-31 receptor. A cutaneous IL-31 injection induces the nuclear accumulation of activated STAT3 first in sensory neurons that abundantly express IL-31 receptor and then in other itch-transmitting neurons. IL-31 enhances itch induced by various pruritogens including even chloroquine. Finally, pruritus associated with dermatitis is partially dependent on sensory neuronal IL-31 receptor and strongly on sensory neuronal STAT3. Thus, sensory neuronal STAT3 is essential for IL-31-induced itch and further contributes to IL-31-independent inflammatory itch.
    MeSH term(s) Animals ; Mice ; Dermatitis, Atopic/metabolism ; Gene Expression ; Mice, Knockout ; Pruritus/chemically induced ; Pruritus/genetics ; Pruritus/metabolism ; Sensory Receptor Cells/metabolism ; Skin/metabolism
    Chemical Substances Itch protein, mouse (EC 2.3.2.26) ; Stat3 protein, mouse
    Language English
    Publishing date 2023-11-28
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2649101-1
    ISSN 2211-1247 ; 2211-1247
    ISSN (online) 2211-1247
    ISSN 2211-1247
    DOI 10.1016/j.celrep.2023.113433
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  9. Article ; Online: TRPV1-positive sensory nerves and neuropeptides are involved in epidermal barrier repair after tape stripping in mice.

    Usui, Kenji / Nakashima, Chisa / Takahashi, Sonoko / Okada, Takaharu / Ishida, Yoshihiro / Nakajima, Saeko / Kitoh, Akihiko / Nomura, Takashi / Dainichi, Teruki / Honda, Tetsuya / Katsumoto, Rumi / Konishi, Noriko / Matsushita, Mutsuyoshi / Otsuka, Atsushi / Kabashima, Kenji

    The Journal of allergy and clinical immunology

    2023  Volume 153, Issue 3, Page(s) 868–873.e4

    Abstract: Background: The integumentary system of the skin serves as an exceptional protective barrier, with the stratum corneum situated at the forefront. This outermost layer is composed of keratinocytes that biosynthesize filaggrin (encoded by the gene Flg), a ...

    Abstract Background: The integumentary system of the skin serves as an exceptional protective barrier, with the stratum corneum situated at the forefront. This outermost layer is composed of keratinocytes that biosynthesize filaggrin (encoded by the gene Flg), a pivotal constituent in maintaining skin health. Nevertheless, the precise role of sensory nerves in restoration of the skin barrier after tape stripping-induced epidermal disruption, in contrast to the wound-healing process, remains a tantalizing enigma.
    Objective: This study aimed to elucidate the cryptic role of sensory nerves in repair of the epidermal barrier following tape stripping-induced disruption.
    Methods: Through the implementation of resiniferatoxin (RTX)-treated denervation mouse model, we investigated the kinetics of barrier repair after tape stripping and performed immunophenotyping and gene expression analysis in the skin or dorsal root ganglia (DRG) to identify potential neuropeptides. Furthermore, we assessed the functional impact of candidates on the recovery of murine keratinocytes and RTX-treated mice.
    Results: Ablation of TRPV1-positive sensory nerve attenuated skin barrier recovery and sustained subcutaneous inflammation, coupled with elevated IL-6 level in ear homogenates after tape stripping. Expression of the keratinocyte differentiation marker Flg in the ear skin of RTX-treated mice was decreased compared with that in control mice. Through neuropeptide screening, we found that the downregulation of Flg by IL-6 was counteracted by somatostatin or octreotide (a chemically stable somatostatin analog). Furthermore, RTX-treated mice given octreotide exhibited a partial improvement in barrier recovery after tape stripping.
    Conclusion: Sensory neurons expressing TRPV1 play an indispensable role in restoring barrier function following epidermal injury. Our findings suggest the potential involvement of somatostatin in restoring epidermal repair after skin injury.
    MeSH term(s) Mice ; Animals ; Interleukin-6/metabolism ; Octreotide/metabolism ; Epidermis/metabolism ; Neuropeptides ; Somatostatin/metabolism ; TRPV Cation Channels/genetics ; TRPV Cation Channels/metabolism
    Chemical Substances Interleukin-6 ; Octreotide (RWM8CCW8GP) ; Neuropeptides ; Somatostatin (51110-01-1) ; TRPV1 protein, mouse ; TRPV Cation Channels
    Language English
    Publishing date 2023-11-30
    Publishing country United States
    Document type Journal Article
    ZDB-ID 121011-7
    ISSN 1097-6825 ; 1085-8725 ; 0091-6749
    ISSN (online) 1097-6825 ; 1085-8725
    ISSN 0091-6749
    DOI 10.1016/j.jaci.2023.11.024
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article: [RECOMMENDATION FOR ITCH ASSESSMENT FROM THE ATOPIC ITCH CONSENSUS MEETING (AICOM)].

    Ebata, Toshiya / Ohya, Yukihiro / Ohshima, Yusei / Andoh, Tsugunobu / Tominaga, Mitsutoshi / Kataoka, Yoko / Fukui, Yoshinori / Ebihara, Nobuyuki / Hasegawa, Shunji / Kobayashi, Shigetoshi / Morisawa, Yutaka / Inoue, Norihiro / Narita, Masami / Kaneko, Sakae / Igawa, Ken / Nakahara, Takeshi / Ishiuji, Yozo / Okada, Takaharu / Fujii, Masanori /
    Kawasaki, Hiroshi / Irie, Hiroyuki / Shiratori-Hayashi, Miho / Murota, Hiroyuki

    Arerugi = [Allergy

    2024  Volume 73, Issue 2, Page(s) 171–179

    Abstract: Background: Itch is the most troublesome symptom of atopic dermatitis, and it is important to assess it appropriately for optimal treatment. We discussed issues regarding itch and the most appropriate methods of assessment at the Atopic Itch Consensus ... ...

    Abstract Background: Itch is the most troublesome symptom of atopic dermatitis, and it is important to assess it appropriately for optimal treatment. We discussed issues regarding itch and the most appropriate methods of assessment at the Atopic Itch Consensus Meeting (AICOM), attended by physicians and researchers with expertise in itch treatment and research.
    Methods: The AICOM participants prepared a draft consensus statement that addressed the most appropriate itch assessment methods for age groups <2 years, 2-6 years, 7-14 years, and ≥15 years. Consensus was defined as agreement by ≥80% of the participants.
    Results: Votes were cast by 20 participants (8 dermatologists, 7 pediatricians, and 5 researchers), and a consensus on the best current methods of itch assessment was reached with 95% agreement. For infants and preschool children, because subjective evaluation is difficult, a checklist for itch assessment was developed for caregivers.
    Conclusion: For itch assessment, we recommend subjective evaluation by the patient using a rating scale. For infants and preschoolers, evaluation should be done by the caregiver using a checklist, combined with objective evaluation (of skin lesions, for example) by a physician. We anticipate that more objective itch assessment indices will be established in the future.
    MeSH term(s) Infant ; Child, Preschool ; Humans ; Severity of Illness Index ; Pruritus/diagnosis ; Pruritus/etiology ; Dermatitis, Atopic/complications ; Dermatitis, Atopic/diagnosis ; Dermatitis, Atopic/therapy
    Language Japanese
    Publishing date 2024-02-16
    Publishing country Japan
    Document type English Abstract ; Journal Article
    ZDB-ID 974201-3
    ISSN 0021-4884
    ISSN 0021-4884
    DOI 10.15036/arerugi.73.171
    Database MEDical Literature Analysis and Retrieval System OnLINE

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