1University of Toronto, Hospital for Sick Children

2University of Toronto, Institute for Health Policy, Management & Evaluation, Toronto, Ontario, Canada

Correspondence: Savithiri Ratnapalan, MBBS, PhD, Professor, Department of Paediatrics and Dalla Lana School of Public Health, University of Toronto, Hospital for Sick Children, 555 University Avenue, Toronto, Ontario, Canada M5G 1X8. Tel: +1 416 813 7532; fax: +1 416 813 5043; e-mail: [email protected]