Do acupuncture trials have lower risk of bias over the last five decades? A methodological study of 4 715 randomized controlled trials

• Youlin Long,

  Roles Formal analysis, Investigation, Methodology, Resources, Software, Visualization, Writing – original draft

  Affiliations Medical Device Regulatory Research and Evaluation Center, West China Hospital, Sichuan University, Chengdu, China, Chinese Cochrane Center, West China Hospital, Sichuan University, Chengdu, China

  http://orcid.org/0000-0002-5421-2645

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• Rui Chen,

  Roles Conceptualization, Formal analysis, Investigation

  Affiliation School of Clinical Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, China

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• Qiong Guo,

  Roles Data curation, Investigation

  Affiliation Chinese Cochrane Center, West China Hospital, Sichuan University, Chengdu, China

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• Shanxia Luo,

  Roles Data curation, Methodology

  Affiliation Department of Mental Health Center, West China Hospital, Sichuan University, Chengdu, China

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• Jin Huang,

  Roles Supervision, Validation, Writing – review & editing

  Affiliations Medical Device Regulatory Research and Evaluation Center, West China Hospital, Sichuan University, Chengdu, China, West China Hospital, Sichuan University, Chengdu, China

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• Liang Du

  Roles Conceptualization, Funding acquisition, Methodology, Writing – review & editing

  * E-mail: duliang0606@vip.sina.com

  Affiliation Chinese Cochrane Center, West China Hospital, Sichuan University, Chengdu, China

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