Frequency of limitations statements in original research articles of United States leading medical journals: A meta-research protocol

• Nin-Chieh Hsu ,

  Contributed equally to this work with: Nin-Chieh Hsu, Hung-Bin Tsai, Chia-Hao Hsu

  Roles Conceptualization, Formal analysis, Funding acquisition, Writing – original draft

  Affiliations Division of Hospital Medicine, Department of Internal Medicine, Taipei City Hospital Zhongxing Branch, Taipei, Taiwan, Department of Internal Medicine, College of Medicine, National Taiwan University, Taipei, Taiwan

  https://orcid.org/0000-0002-4997-1081

  ⨯
• Hung-Bin Tsai ,

  Contributed equally to this work with: Nin-Chieh Hsu, Hung-Bin Tsai, Chia-Hao Hsu

  Roles Investigation, Resources

  Affiliations Division of Hospital Medicine, Department of Internal Medicine, Taipei City Hospital Zhongxing Branch, Taipei, Taiwan, Department of Internal Medicine, College of Medicine, National Taiwan University, Taipei, Taiwan

  ⨯
• Chia-Hao Hsu ,

  Contributed equally to this work with: Nin-Chieh Hsu, Hung-Bin Tsai, Chia-Hao Hsu

  Roles Formal analysis, Investigation

  Affiliations Department of Orthopedics, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan

  ⨯
• Ming-Yan Tsai,

  Roles Methodology

  Affiliation Division of Hospital Medicine, Department of Internal Medicine, Taipei City Hospital Zhongxing Branch, Taipei, Taiwan

  ⨯
• Charles Liao,

  Roles Writing – review & editing

  Affiliation Department of Internal Medicine, Stanford University, School of Medicine, Stanford, California, United States of America

  ⨯
• Yasuharu Tokuda

  Roles Conceptualization, Supervision, Writing – review & editing

  * E-mail: yasuharu.tokuda@gmail.com

  Affiliations Muribushi Okinawa Clinical Training Center, Urasoe City, Okinawa, Japan, Tokyo Foundation for Policy Research, Roppongi, Minato-ku, Tokyo, Japan

  https://orcid.org/0000-0002-9325-7934

  ⨯