Authors: George Ioannidis; Alexandra Papaioannou; Lehana Thabane; Amiram Gafni; Anthony Hodsman; Brent Kvern; Dan Johnstone; Nathalie Plumley; Alanna Baldwin; M Doupe; Alan Katz; Lena Salach; Jonathan D Adachi Journal: Can Fam Physician Date: 2007-10 Impact factor: 3.275