1. Brown University School of Public Health, Providence, Rhode Island, and Dalla Lana School of Public Health, University of Toronto, Toronto, Ontario, Canada (K.N.H.)
2. Dalla Lana School of Public Health, University of Toronto, ICES, and Public Health Ontario, Toronto, Ontario, Canada (K.A.B.)
3. Dalla Lana School of Public Health and Department of Medicine, University of Toronto, and University Health Network, Toronto, Ontario, Canada (A.M.C.)
4. Department of Medicine, University of Toronto, and Centre for Osteoporosis & Bone Health, Women's College Hospital, Toronto, Ontario, Canada (S.A.K.)
5. Dalla Lana School of Public Health, University of Toronto, ICES, and Sunnybrook Research Institute, Toronto, Ontario, Canada (D.N.J.)
6. Dalla Lana School of Public Health and Leslie Dan Faculty of Pharmacy at the University of Toronto and ICES, Toronto, Ontario, Canada, and Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, North Carolina (S.M.C.).