Authors: Bradley C Johnston; Pablo Alonso-Coello; Jan O Friedrich; Reem A Mustafa; Kari A O Tikkinen; Ignacio Neumann; Per O Vandvik; Elie A Akl; Bruno R da Costa; Neill K Adhikari; Gemma Mas Dalmau; Elise Kosunen; Jukka Mustonen; Mark W Crawford; Lehana Thabane; Gordon H Guyatt Journal: CMAJ Date: 2015-10-26 Impact factor: 8.262