SPIRIT 2013 statement: defining standard protocol items for clinical trials. (Annals of internal medicine, 2013)

(untitled) - Chan, A; Tetzlaff, J; Altman, D; Laupacis, A; Gøtzsche, P; Krleža-Jerić, K; Hróbjartsson, A; Mann, H; Dickersin, K; Berlin, J; Doré, C; Parulekar, W; et al.