The effects of vitamin D supplementation on wound healing and metabolic status in patients with diabetic foot ulcer: A randomized, double-blind, placebo-controlled trial - Razzaghi, R; Pourbagheri, H; Momen-Heravi, M; Bahmani, F; Shadi, J; Soleimani, Z; Asemi, Z (J Diabetes Complications, 2017)