Effect of vitamin D supplementation on pain and physical function in patients with knee osteoarthritis (OA): an OA Trial Bank protocol for a systematic review and individual patient data (IPD) meta-analysis.
Xingzhong JinBenny AntonyXia WangMonica S M PerssonTimothy McAlindonNigel K ArdenSudeepti SrivastavaRajeshwar SrivastavaMarienke Van MiddelkoopSita Ma Bierma-ZeinstraWeiya ZhangFlavia CicuttiniChanghai DingPublished in: BMJ open (2020)
CRD42018107740.