1. Department of Medicine; Dalhousie University; Halifax Nova Scotia Canada
2. Center for Health Care of the Elderly; QEII Health Sciences Centre; Capital District Health Authority; Halifax Nova Scotia Canada
3. Division of Orthopedics; Department of Surgery; School of Biomedical Engineering; Dalhousie University; Halifax Nova Scotia Canada
4. Department of Community Health and Epidemiology; Dalhousie University; Halifax Nova Scotia Canada