[1] Bruyere Res Inst, CT Lamont Primary Hlth Care Res Ctr, 43 Bruyere St, Ottawa, ON K1N 5C8, Canada
[2] Univ Ottawa, Sch Epidemiol & Publ Hlth, Fac Med, 600 Peter Morand Crescent, Ottawa, ON K1G 5Z3, Canada
[3] Univ Toronto, Dept Phys Therapy, Fac Med, 160-500 Univ Ave, Toronto, ON M5G 1V7, Canada
[4] Univ Toronto, Rehabil Sci Inst, Sch Grad Studies, 27 Kings Coll Circle, Toronto, ON M5S 1A1, Canada
[5] Univ Toronto, Inst Hlth Policy Management & Evaluat, 155 Coll St,Suite 425, Toronto, ON M5T 3M6, Canada
[6] Community HIV Volunteer, Halifax, NS, Canada
[7] Univ Ottawa, Dept Family Med, 600 Peter Morand Crescent, Ottawa, ON K1G 5Z3, Canada
[8] Inst Clin & Evaluat Sci, 2075 Bayview Ave, Toronto, ON M4N 3M5, Canada
[9] St Michaels Hosp, Li Ka Shing Knowledge Inst, 30 Bond St, Toronto, ON M5B 1W8, Canada
[10] Ottawa Hosp, Res Inst, Clin Epidemiol Program, 501 Smyth Rd, Ottawa, ON K1H 8L6, Canada