[1] Univ Auckland, Dept Gen Practice & Primary Hlth Care, Fac Med & Hlth Sci, Auckland, New Zealand
[2] Robert Graham Ctr Policy Studies Family Med & Pri, Washington, DC USA
[3] Univ East Anglia Norwich, Sch Med, Dept Primary Care, Norwich, Norfolk, England
[4] Univ Toronto, Dept Family & Community Med, Toronto, ON, Canada
[5] Flinders Univ S Australia, Southgate Inst Hlth Soc & Equ, Adelaide, SA, Australia
[6] Amer Board Family Med, Res & Policy Dept, Lexington, KY USA
[7] Radboud Univ Nijmegen, Radboud Inst Hlth Res, Dept Primary & Community Care, Nijmegen, Netherlands
[8] Australian Natl Univ, Dept Hlth Serv Res & Policy, Acton, ACT, Australia