Merrick Zwarenstein1, Alison Howie2. 1. Centre for Studies in Family Medicine, Department of Family Medicine, Schulich School of Medicine and Dentistry, Western University, Ontario, London, Canada. merrick.zwarenstein@ices.on.ca. 2. Centre for Studies in Family Medicine, Department of Family Medicine, Schulich School of Medicine and Dentistry, Western University, Ontario, London, Canada.