[1] Med Univ Graz, Inst Gen Practice & Evidence Based Hlth Serv Res, A-8010 Graz, Austria
[2] London Sch Hyg & Trop Med, Dept Hlth Serv Res & Policy, Fac Publ Hlth & Policy, London WC1, England
[3] Univ Calif Los Angeles, Fielding Sch Publ Hlth, Dept Hlth Policy & Management, Los Angeles, CA USA
[4] Univ Calif Los Angeles, Dept Community Hlth Sci, Fielding Sch Publ Hlth, Los Angeles, CA USA
[5] Acad Family Phys India, New Delhi, India
[6] Radboud Univ Nijmegen, Med Ctr, NL-6525 ED Nijmegen, Netherlands
[7] Australian Natl Univ, Australian Primary Hlth Care Res Inst, Canberra, ACT, Australia