1. Department of Physical Therapy, University of Toronto, Toronto; School of Rehabilitation Science, McMaster University, Hamilton; Ontario Canada
2. Department of Physical Therapy, University of Toronto; Research Associate, Health Economics and HIV/AIDS Research Division (HEARD), University of KwaZulu-Natal (South Africa); Toronto, Ontario Canada
3. St. Michael's Hospital; Centre for Research on Inner City Health in the Li Ka Shing Knowledge Institute; 30 Bond Street Toronto, Ontario Canada M5B 1W2