1. Dalhousie University; Department of Community Health & Epidemiology; 5790 University Avenue Room 403 Halifax NS Canada B3H 1V7
2. Dalhousie University; Department of Community Health and Epidemiology; Halifax Nova Scotia Canada
3. Keele University; School of Primary, Community and Social Care; David Weatherall Building, Keele University Campus Keele Staffordshire UK ST5 5BG
4. Monash University; Department of Physiotherapy, Faculty of Medicine, Nursing and Health Sciences; Peninsula Campus Frankston Victoria Australia 3199
5. Royal Holloway University of London; Department of Psychology; Egham Surrey UK TW20 0EX
6. Dalhousie University; Community Health & Epidemiology; 5760 University Avenue Halifax Canada B3H 1V7