Factors associated with depression and effects of vitamin d supplementation and maintainingvitamin d sufficiency on depression in patients with knee osteoarthritis. (April 2018) - Zheng, S.; Tu, L.; Cicuttini, F.; Han, W.; Zhu, Z.; Antony, B.; Wluka, A.; Winzenberg, T.; Aitken, D.; Blizzard, L.; Jones, G.; Ding, C.