[1] Univ Western Ontario, Schulich Sch Med & Dent, Dept Family Med, Ctr Studies Family Med, London, ON N6A 3K7, Canada
[2] Univ Western Ontario, Kings Univ Coll, Sch Social Work, London, ON N6A 2M3, Canada
[3] Univ Western Australia, Sir Charles Gairdiner Hosp, Sch Med & Pharmacol, Perth, WA 6009, Australia
[4] S St Hosp, London Hlth Sci Ctr, Clin Res Adm, London, ON, Canada
[5] Univ Western Ontario, Schulich Sch Med & Dent, Dept Med, London, ON N6A 3K7, Canada