Features of patients with rheumatoid arthritis whose debut joint is a foot or ankle joint: A 5,479-case study from the IORRA cohort

• Koichiro Yano,

  Roles Conceptualization, Investigation, Methodology, Writing – original draft

  Affiliations Institute of Rheumatology, Tokyo Women’s Medical University, Shinjuku, Tokyo, Japan, Department of Orthopedic surgery, Tokyo Women’s Medical University, Shinjuku, Tokyo, Japan

  ⨯
• Katsunori Ikari ,

  Roles Data curation, Funding acquisition, Methodology, Project administration, Supervision, Writing – review & editing

  * E-mail: ikari.katsunori@twmu.ac.jp

  Affiliations Institute of Rheumatology, Tokyo Women’s Medical University, Shinjuku, Tokyo, Japan, Department of Orthopedic surgery, Tokyo Women’s Medical University, Shinjuku, Tokyo, Japan

  http://orcid.org/0000-0001-9066-2005

  ⨯
• Eisuke Inoue,

  Roles Data curation, Formal analysis

  Affiliations Institute of Rheumatology, Tokyo Women’s Medical University, Shinjuku, Tokyo, Japan, Medical Informatics, St. Marianna University School of Medicine, Kawasaki, Kanagawa, Japan

  ⨯
• Yu Sakuma,

  Roles Data curation

  Affiliations Institute of Rheumatology, Tokyo Women’s Medical University, Shinjuku, Tokyo, Japan, Department of Orthopedic surgery, Tokyo Women’s Medical University, Shinjuku, Tokyo, Japan

  ⨯
• Takeshi Mochizuki,

  Roles Data curation

  Affiliations Institute of Rheumatology, Tokyo Women’s Medical University, Shinjuku, Tokyo, Japan, Department of Orthopedic surgery, Tokyo Women’s Medical University, Shinjuku, Tokyo, Japan, Department of Orthopedic surgery, Kamagaya General Hospital, Kamagaya, Chiba, Japan

  ⨯
• Naoko Koenuma,

  Roles Data curation

  Affiliations Institute of Rheumatology, Tokyo Women’s Medical University, Shinjuku, Tokyo, Japan, Department of Orthopedic surgery, Tokyo Women’s Medical University, Shinjuku, Tokyo, Japan

  ⨯
• Haruki Tobimatsu,

  Roles Data curation

  Affiliations Institute of Rheumatology, Tokyo Women’s Medical University, Shinjuku, Tokyo, Japan, Department of Orthopedic surgery, Tokyo Women’s Medical University, Shinjuku, Tokyo, Japan

  ⨯
• Eiichi Tanaka,

  Roles Data curation

  Affiliation Institute of Rheumatology, Tokyo Women’s Medical University, Shinjuku, Tokyo, Japan

  ⨯
• Atsuo Taniguchi,

  Roles Data curation

  Affiliation Institute of Rheumatology, Tokyo Women’s Medical University, Shinjuku, Tokyo, Japan

  ⨯
• Ken Okazaki,

  Roles Supervision, Writing – review & editing

  Affiliations Institute of Rheumatology, Tokyo Women’s Medical University, Shinjuku, Tokyo, Japan, Department of Orthopedic surgery, Tokyo Women’s Medical University, Shinjuku, Tokyo, Japan

  ⨯
• Hisashi Yamanaka

  Roles Data curation, Project administration, Supervision, Writing – review & editing

  Affiliation Institute of Rheumatology, Tokyo Women’s Medical University, Shinjuku, Tokyo, Japan

  ⨯