1. RCSI Medical School; HRB Centre for Primary Care Research, Department of General Practice; 123 St Stephens Green Dublin 2 Ireland
2. Trinity College Centre for Health Sciences; Department of Public Health and Primary Care; Adelaide and Meath Hosptials, Incorporating the National Children's Hospital Tallaght Dublin Ireland 24
3. University of Sherbrooke; Department of Family Medicine; Unite de Medicine de famille de Chicoutimi 305, St-Vallier Chicoutimi Quebec QC Canada G7H 5H6