Canadian Multicentre Osteoporosis Study Group Members:CaMos Coordinating Centre, McGill University, Montreal, Quebec: David Goltzman, MD (coprincipal investigator), Nancy Kreiger, PhD (coprincipal investigator), Alan Tenenhouse, MD, PhD (investigator emeritus), Suzette Poliquin, MSc (national coordinator), Suzanne Godmaire (research assistant), and Claudie Berger, MSc (study statistician). Memorial University, St John’s, Newfoundland: Carol Joyce, MD (director) and Emma Sheppard (coordinator). Dalhousie University, Halifax, Nova Scotia: Susan Kirkland, MD, and Stephanie Kaiser, MD (codirectors) and Barbara Stanfield (coordinator). Laval University, Quebec City, Quebec: Jacques P. Brown, MD (director), Louis Bessette, MD (codirector), and Marc Gendreau (imaging coordinator). Queen's University, Kingston, Ontario: Tassos Anastassiades, MD, PhD (director), Tanveer Towheed, MD (codirector), and Barbara Matthews (coordinator). University of Toronto, Toronto, Ontario: Bob Josse, MD (director), Tim Murray, MD, FRCPC (codirector), and Barbara Gardner-Bray (coordinator). McMaster University, Hamilton, Ontario: Jonathan D. Adachi, MD (director), Alexandra Papaioannou, MD, MSc (codirector), and Laura Pickard, MA (coordinator). University of Saskatchewan, Saskatoon: Wojciech P. Olszynski, MD, PhD, FRCPC (director), Shawn Davison, PhD (codirector), and Jola Thingvold (coordinator). University of Calgary, Calgary, Alberta: David A. Hanley, MD (director) and Jane Allan (coordinator). University of British Columbia, Vancouver: Jerilynn C. Prior, MD (director) and Yvette Vigna (coordinator).