Jin, X., Antony, B., Wang, X., Persson, M. S., McAlindon, T., Arden, N. K., Arden, N. K., Srivastava, S., Srivastava, R., Van Middelkoop, M., Bierma-Zeinstra, S. M., Bierma-Zeinstra, S. M., Zhang, W., Cicuttini, F., & Ding, C. (2020). 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. BMJ Open, 10(4), Article e035302. https://doi.org/10.1136/bmjopen-2019-035302