Authors: Marcello Tonelli; Sarah Connor Gorber; Michel Joffres; James Dickinson; Harminder Singh; Gabriela Lewin; Richard Birtwhistle; Donna Fitzpatrick-Lewis; Nicole Hodgson; Donna Ciliska; Mary Gauld; Yan Yun Liu Journal: CMAJ Date: 2011-11-22 Impact factor: 8.262