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Consideration on the high activation mechanism of bispecific antibodies by multi-scale analysis for the design of next-generation antibodies

Research Project

Project/Area Number 19H03511
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 50020:Tumor diagnostics and therapeutics-related
Research InstitutionTokyo University of Agriculture and Technology

Principal Investigator

Kumagai Izumi  東京農工大学, 工学(系)研究科(研究院), 客員教授 (10161689)

Co-Investigator(Kenkyū-buntansha) 田中 良和  東北大学, 生命科学研究科, 教授 (20374225)
真壁 幸樹  山形大学, 大学院理工学研究科, 准教授 (20508072)
浅野 竜太郎  東京農工大学, 工学(系)研究科(研究院), 教授 (80323103)
Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥17,420,000 (Direct Cost: ¥13,400,000、Indirect Cost: ¥4,020,000)
Fiscal Year 2021: ¥5,980,000 (Direct Cost: ¥4,600,000、Indirect Cost: ¥1,380,000)
Fiscal Year 2020: ¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2019: ¥5,980,000 (Direct Cost: ¥4,600,000、Indirect Cost: ¥1,380,000)
Keywords二重特異性抗体 / マルチスケール解析 / 次世代抗体設計
Outline of Research at the Start

異なる2種の抗体の抗原結合ドメインを繋げると、2分子間を架橋可能な二重特異性抗体が作製される。これまで、がん細胞と免疫細胞間の架橋により抗腫瘍効果を発揮する二重特異性抗体の開発に取り組み、抗原結合ドメインの空間配置の違いにより活性が増減することを突き止めた。残された課題は、これらの分子構造の違いがもたらした活性差の機構解明であり、より効果的な抗体医薬シーズの創製には不可欠である。本研究では最先端のマルチスケール解析により、二重特異性抗体で架橋された、がん細胞と免疫細胞のインターフェイスを描像し、空間配置の違いが、如何に細胞間架橋の違いをもたらし、また活性に影響を及ぼすのかを明らかにする。

Outline of Final Research Achievements

To elucidate the high activation mechanism of bispecific antibodies caused by the differences in the molecular configuration, we evaluated them through various analytical techniques. The result of evaluation of the intercellular cross-linking abilities using atomic force microscopy (AFM)-sensing revealed that it is important to have a structure that can cross-link cells with a stronger force for the induction of high activity. In addition, it was clarified that the effectiveness as a therapeutic agent can be explained by negative stain single particle analysis of the antibody-antigen complex using a transmission electron microscope.

Academic Significance and Societal Importance of the Research Achievements

既存の抗体医薬の治療満足度は必ずしも高くないため、より強力な薬効を示す次世代抗体の開発が進められている。二重特異性抗体は特に期待が寄せられている形態のひとつであり、このため高い活性をもたらす構造の解明は待ち望まれている。有効性と相関がみられた原子間力顕微鏡を用いた細胞間架橋度測定法、および治療薬としての有効性の外挿が期待される抗体抗原複合体の電子顕微鏡単粒子解析は、今後より実用的な二重特異性抗体の開発に寄与することが期待される。

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Annual Research Report
  • 2019 Annual Research Report
  • Research Products

    (49 results)

All 2022 2021 2020 2019

All Journal Article (23 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 21 results,  Open Access: 14 results) Presentation (26 results) (of which Int'l Joint Research: 1 results,  Invited: 7 results)

  • [Journal Article] Fabrication of Fragment Antibody-Enzyme Complex as a Sensing Element for Immunosensing2022

    • Author(s)
      Oda M., Asano R
    • Journal Title

      International Journal of Molecular Sciences

      Volume: 23 (3) Issue: 3 Pages: 1335-1335

    • DOI

      10.3390/ijms23031335

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] 低分子型二重特異性抗体の高機能化戦略2022

    • Author(s)
      浅野竜太郎, 熊谷 泉
    • Journal Title

      バイオサイエンスとインダストリー

      Volume: 80 (1) Pages: 40-41

    • Related Report
      2021 Annual Research Report
  • [Journal Article] Surface Engineering of Top7 to Facilitate Structure Determination2022

    • Author(s)
      Yuki Ito, Takuya Araki, Shota Shiga, Hiroyuki Konno, Koki Makabe
    • Journal Title

      Int J Mol Sci

      Volume: 23(2) Issue: 2 Pages: 701-701

    • DOI

      10.3390/ijms23020701

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Rapid, convenient, and highly sensitive detection of human hemoglobin in serum using a high-affinity bivalent antibody-enzyme complex2021

    • Author(s)
      Miura D., Kimura H., Tsugawa W., Ikebukuro K., Sode K., Asano R.
    • Journal Title

      Talanta

      Volume: 234 Pages: 122638-122638

    • DOI

      10.1016/j.talanta.2021.122638

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Evaluation of intercellular cross-linking abilities correlated with cytotoxicities of bispecific antibodies with domain rearrangements using AFM force-sensing2021

    • Author(s)
      Maejima A., Ishibashi K., Kim H., Kumagai I., Asano R.
    • Journal Title

      Biosensors and Bioelectronics

      Volume: 178 Pages: 113037-113037

    • DOI

      10.1016/j.bios.2021.113037

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] T Cell Bispecific Antibodies: An Antibody-Based Delivery System for Inducing Antitumor Immunity2021

    • Author(s)
      Kamakura D., Asano R., Yasunaga M.
    • Journal Title

      Pharmaceuticals

      Volume: 14 (11) Issue: 11 Pages: 1172-1172

    • DOI

      10.3390/ph14111172

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] 二重特異性がん治療抗体の機能的な構造の理解に向けたあゆみ2021

    • Author(s)
      浅野竜太郎, 真壁幸樹, 田中良和, 熊谷 泉
    • Journal Title

      医学のあゆみ

      Volume: 278 (6) Pages: 617-622

    • Related Report
      2021 Annual Research Report
  • [Journal Article] Structural analysis of the β-sheet edge of peptide self-assembly using a model protein2021

    • Author(s)
      Shota Shiga, Koki Makabe
    • Journal Title

      Proteins

      Volume: 89(7) Issue: 7 Pages: 845-852

    • DOI

      10.1002/prot.26063

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Biochemical properties of CumA multicopper oxidase from plant pathogen, <i>Pseudomonas syringae</i>2021

    • Author(s)
      Ishida Konan、Tsukamoto Yuya、Horitani Masaki、Ogawa Tomohisa、Tanaka Yoshikazu
    • Journal Title

      Bioscience, Biotechnology, and Biochemistry

      Volume: 85 Issue: 9 Pages: 1995-2002

    • DOI

      10.1093/bbb/zbab123

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Structural insights reveal the second base catalyst of isomaltose glucohydrolase2021

    • Author(s)
      Tagami Takayoshi、Chen Minghao、Furunaga Yuta、Kikuchi Asako、Sadahiro Juri、Lang Weeranuch、Okuyama Masayuki、Tanaka Yoshikazu、Iwasaki Tomohito、Yao Min、Kimura Atsuo
    • Journal Title

      The FEBS Journal

      Volume: 289 Issue: 4 Pages: 1118-1134

    • DOI

      10.1111/febs.16237

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Anti-EGFR antibody 528 binds to domain III of EGFR at a site shifted from the cetuximab epitope2021

    • Author(s)
      Makabe Koki、Yokoyama Takeshi、Uehara Shiro、Uchikubo-Kamo Tomomi、Shirouzu Mikako、Kimura Kouki、Tsumoto Kouhei、Asano Ryutaro、Tanaka Yoshikazu、Kumagai Izumi
    • Journal Title

      Scientific Reports

      Volume: 11 Issue: 1 Pages: 5790-5790

    • DOI

      10.1038/s41598-021-84171-3

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Rapid and homogeneous electrochemical detection by fabricating a high affinity bispecific antibody-enzyme complex using two Catcher/Tag systems2021

    • Author(s)
      Kimura Hayato、Miura Daimei、Tsugawa Wakako、Ikebukuro Kazunori、Sode Koji、Asano Ryutaro
    • Journal Title

      Biosensors and Bioelectronics

      Volume: 175 Pages: 112885-112885

    • DOI

      10.1016/j.bios.2020.112885

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Mechanism of action of a T cell-dependent bispecific antibody as a breakthrough immunotherapy against refractory colorectal cancer with an oncogenic mutation2021

    • Author(s)
      Kamakura D., Asano R., Kawai H., Yasunaga M.
    • Journal Title

      Cancer Immunology, Immunotherapy

      Volume: 70 Issue: 1 Pages: 177-188

    • DOI

      10.1007/s00262-020-02667-9

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Association behavior and control of the quality of cancer therapeutic bispecific diabodies expressed in Escherichia coli2020

    • Author(s)
      Hikaru Nakazawa, Tomoko Onodera-Sugano, Aruto Sugiyama, Yoshikazu Tanaka, Takamitsu Hattori, Teppei Niide, Hiromi Ogata, Ryutaro Asano, Izumi Kumagai, Mitsuo Umetsu
    • Journal Title

      Biochemical Engineering Journal

      Volume: 160 Pages: 1-9

    • DOI

      10.1016/j.bej.2020.107636

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Functional Domain Order of an Anti-EGFR × Anti-CD16 Bispecific Diabody Involving NK Cell Activation2020

    • Author(s)
      Kuwahara Atsushi、Nagai Keisuke、Nakanishi Takeshi、Kumagai Izumi、Asano Ryutaro
    • Journal Title

      International Journal of Molecular Sciences

      Volume: 21 Issue: 23 Pages: 8914-8914

    • DOI

      10.3390/ijms21238914

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Cooperative unfolding of a single-layer β-sheet protein, CPAP G-box2020

    • Author(s)
      Hideki Fujiwara, Shota Shiga, Koki Makabe
    • Journal Title

      Biochem Biophys Res Commun

      Volume: 526(1) Issue: 1 Pages: 105-109

    • DOI

      10.1016/j.bbrc.2020.03.056

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Residue-Specific Binding Mechanisms of Thioflavin T to a Surface of Flat β-Sheets within a Peptide Self-Assembly Mimic2020

    • Author(s)
      Sae Namioka, Norio Yoshida, Hiroyuki Konno, Koki Makabe
    • Journal Title

      Biochemistry

      Volume: 59(30) Issue: 30 Pages: 2782-2787

    • DOI

      10.1021/acs.biochem.0c00280

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] The N-terminal amino-latch region of Hlg2 component of staphylococcal bi-component γ-haemolysin is dispensable for prestem release to form β-barrel pores2020

    • Author(s)
      Takeda Kein、Tanaka Yoshikazu、Kaneko Jun
    • Journal Title

      The Journal of Biochemistry

      Volume: 168 Issue: 4 Pages: 349-354

    • DOI

      10.1093/jb/mvaa052

    • NAID

      40022393358

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] A straightforward approach to antibodies recognising cancer specific glycopeptidic neoepitopes2020

    • Author(s)
      Wakui Hajime、Tanaka Yoshikazu、Ose Toyoyuki、Matsumoto Isamu、Kato Koji、Min Yao、Tachibana Taro、Sato Masaharu、Naruchi Kentaro、Martin Fayna Garcia、Hinou Hiroshi、Nishimura Shin-Ichiro
    • Journal Title

      Chemical Science

      Volume: 11 Issue: 19 Pages: 4999-5006

    • DOI

      10.1039/d0sc00317d

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Build-up Functionalization of anti-EGFR × anti-CD3 Bispecific Diabodies by Integrating High-Affinity Mutants and Functional Molecular Formats.2020

    • Author(s)
      Asano R, Hosokawa K, Taki S, Konno S, Shimomura I, Ogata H, Okada M, Arai K, Nakanishi T, Onitsuka M, Omasa T, Umetsu M, Kumagai I.
    • Journal Title

      Sci. Rep.

      Volume: 10(1) Issue: 1 Pages: 4913-4913

    • DOI

      10.1038/s41598-020-61840-3

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Chemically Crosslinked Bispecific Antibodies for Cancer Therapy: Breaking from the Structural Restrictions of the Genetic Fusion Approach2020

    • Author(s)
      Ueda Asami, Umetsu Mitsuo, Nakanishi Takeshi, Hashikami Kentaro, Nakazawa Hikaru, Hattori Shuhei, Asano Ryutaro, Kumagai Izumi
    • Journal Title

      Int. J. Mol. Sci.

      Volume: 21 Issue: 3 Pages: 711-714

    • DOI

      10.3390/ijms21030711

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Construction of a Circularly Connected VHH Bispecific Antibody (Cyclobody) for the Desirable Positioning of Antigen-Binding Sites.2020

    • Author(s)
      Hemmi S, Asano R, Kimura K, Umetsu M, TNakanishi T, Kumagai I, Makabe K.
    • Journal Title

      Biochem. Biophys. Res. Commun.

      Volume: 523(1) Issue: 1 Pages: 72-77

    • DOI

      10.1016/j.bbrc.2019.12.018

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Protein encapsulation in the hollow space of hemocyanin crystals containing a covalently conjugated ligand2019

    • Author(s)
      Tsubasa Hashimoto, Yuxin Ye, Mihoko Ui, Tohohisa Ogawa, Takashi Matsui, and Yoshikazu Tanaka
    • Journal Title

      Biochem. Biophys. Res. Commun.

      Volume: 印刷中 Issue: 1 Pages: 31-36

    • DOI

      10.1016/j.bbrc.2019.04.062

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Presentation] 低分子二重特異性抗体の機能改変を目指したブレビバチルス菌表層提示2022

    • Author(s)
      中原維新, 大室朋海, 浅野竜太郎
    • Organizer
      日本化学会第102春季年会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 環状型小型バイスペシフィック抗体(Cyclobody BiTE)の構築と評価2022

    • Author(s)
      山田梨沙、中原維新、中西猛、浅野竜太郎、真壁幸樹
    • Organizer
      2021年度 生物物理学会 北海道支部・東北支部合同例会
    • Related Report
      2021 Annual Research Report
  • [Presentation] がん治療薬を指向した環状型小型バイスペシフィック抗体(Cyclobody BiTE)の構築と評価2022

    • Author(s)
      山田梨沙、中原維新、中西猛、浅野竜太郎、真壁幸樹
    • Organizer
      日本薬学会第142年会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 配向性の異なる二重特異性抗体の原子間力顕微鏡を用いた細胞間架橋能評価2021

    • Author(s)
      前島 敦, 石橋健太, 金賢徹, 熊谷 泉, 浅野竜太郎
    • Organizer
      第44回日本分子生物学会年会
    • Related Report
      2021 Annual Research Report
  • [Presentation] インターロイキン2 (IL-2) の融合による二重特異性がん治療抗体の高機能化2021

    • Author(s)
      廣野琳子, 浅野竜太郎, 熊谷泉, 池袋一典
    • Organizer
      第44回日本分子生物学会年会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 抗体酵素複合体を利用したヘモグロビンの迅速簡便かつ高感度な電気化学測定手法の開発2021

    • Author(s)
      三浦大明, 木村勇斗, 津川若子, 早出広司, 池袋一典, 浅野竜太郎
    • Organizer
      2021年電気化学会秋季年会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 低分子抗体と乳酸酸化酵素を用いた電気化学イムノセンシング素子の開発2021

    • Author(s)
      織田美帆, 平賀健太郎, 塚本夏海, 早出広司, 津川若子, 池袋一典, 浅野竜太郎
    • Organizer
      2021年電気化学会秋季年会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Convenient and universal fabrication of high affinity bispecific bivalent antibody-enzyme complex as sensing element using two Catcher/Tag systems2021

    • Author(s)
      Hayato Kimura, Ryutaro Asano, Wakako Tsugawa, Kazunori Ikebukuro, Koji Sode
    • Organizer
      BIOSENSORS 2021
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 二重特異性抗体医薬の開発: これまでとこれから2021

    • Author(s)
      浅野竜太郎
    • Organizer
      第37回日本DDS学会学術集会
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] Design of staphylococcal two-component pore forming toxin to change pore formation property2021

    • Author(s)
      Nouran Ghanem, Takashi Matsui, Jun Kaneko, Tomomi Uchikubo-Kamo, Mikako Shirouzu, Tsubasa Hashimoto, Tomohisa Ogawa, Tomoaki Matsuura, Huang Po-Ssu, Takeshi Yokoyama, Yoshikazu Tanaka
    • Organizer
      第59回日本生物物理学会年会
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] サイトカイン受容体を活性化する海洋天然物由来タンパク質の構造的考察2021

    • Author(s)
      田中良和
    • Organizer
      R022量子構造生物学委員会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 海洋天然物由来の新規生理活性タンパク質の構造機能解析2021

    • Author(s)
      田中 良和, 影山 大夢, 辺 ひろみ, 増渕 菜弥,中島 寛也, 小野寺 かこ, 大城 拓未, 松井 崇, 小寺 義男, 小川 智久, 横山 武司, 小松 則夫, 荒木 真理人, 酒井 隆一
    • Organizer
      第94回日本生化学会大会
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] ヒト上皮増殖因子受容体のセンシングを目指した乳酸酸化酵素融合抗体の開発と機能評価2021

    • Author(s)
      織田美帆, 平賀健太郎, 塚本夏海, 早出広司, 津川若子, 池袋一典, 浅野竜太郎
    • Organizer
      電気化学会第88回大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Development of novel quantitative method to evaluate cross-linking ability of bispecific antibodies using atomic force microscopy.2020

    • Author(s)
      Atsushi Maejima, Kenta Ishibashi, Hyonchol Kim, Kazunori Ikebukuro, Izumi Kumagai, Ryutaro Asano,
    • Organizer
      第20回日本蛋白質科学会年会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Development Of Novel Preparation Method For Bispecific Antibody Using Dimerizing Motif And Refolding Procedure2020

    • Author(s)
      Linko Hirono, Kazunori Ikebukuro, Izumi Kumagai, Ryutaro Asano
    • Organizer
      第20回日本蛋白質科学会年会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 原子間力顕微鏡を用いたがん細胞傷害活性の異なる二重特異性抗体の細胞間架橋能評価2020

    • Author(s)
      前島 敦, 石橋健太, 池袋一典, 金 賢徹, 熊谷 泉, 浅野竜太郎
    • Organizer
      日本化学会第101回春季年会
    • Related Report
      2020 Annual Research Report
  • [Presentation] シアノバクテリアを用いた低分子二重特異性がん治療抗体の発現量の向上を目指した検討2020

    • Author(s)
      葛西豪太, 池袋一典, 早出広司, 浅野竜太郎
    • Organizer
      日本化学会第101回春季年会
    • Related Report
      2020 Annual Research Report
  • [Presentation] がん細胞とNK細胞間を架橋する低分子二重特異性抗体の機能的な分子構造2020

    • Author(s)
      桒原徳、浅野竜太郎、中西猛、津川若子、池袋一典
    • Organizer
      日本化学会第100春季年会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 医用を目指した人工抗体の開発-がん治療からバイオセンシング-2020

    • Author(s)
      浅野竜太郎
    • Organizer
      大阪市立大学大学院工学研究科 医工・生命工学教育研究センター 第8回セミナー
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] がん細胞・T細胞・NK細胞を標的とした三重特異性がん治療抗体の開発2019

    • Author(s)
      木村昂稀、鈴木沙緒理、桒原徳、中西猛、浅野竜太郎
    • Organizer
      第92回日本生化学会大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] がん細胞とNK細胞を標的とした低分子二重特異性抗体の配向性の検討2019

    • Author(s)
      桒原徳、津川若子、早出広司、浅野竜太郎
    • Organizer
      生体機能関連化学部会 若手の会 第31回サマースクール
    • Related Report
      2019 Annual Research Report
  • [Presentation] 抗体工学の基礎と応用~抗体医薬品およびイムノセンサーの開発トレンドとこれらの開発に必要な知識と技術~2019

    • Author(s)
      浅野竜太郎
    • Organizer
      BST講習会
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] 環状VHH二重特異性抗体Cyclobodyの機能評価2019

    • Author(s)
      逸見早紀、木村昂稀、梅津光央、中西猛、浅野竜太郎、真壁幸樹
    • Organizer
      蛋白質科学会第19回年会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Characterization of circularly connected VHH bispecific antibody, Cyclobody2019

    • Author(s)
      逸見早紀、浅野竜太郎、木村昂稀、梅津光央、中西猛、熊谷泉、真壁幸樹
    • Organizer
      2019年化学系学協会東北大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] X線結晶構造解析とクライオ電子顕微鏡の相関構造解析の有用性ーヘモシアニンを例としてー2019

    • Author(s)
      田中良和
    • Organizer
      日本蛋白質科学会ランチョンセミナー
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] Structure analysis of squid hemocyanin using both X-ray crystallography and cryo-EM2019

    • Author(s)
      田中良和、松井崇、Stefan Raunser、Gatsogiannis Christos
    • Organizer
      化学系学協会東北大会
    • Related Report
      2019 Annual Research Report
    • Invited

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Published: 2019-04-18   Modified: 2023-01-30  

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