[1] Univ Washington, Seattle, WA USA
[2] Monash Univ, Sch Primary & Allied Hlth Care, Melbourne, Vic, Australia
[3] Bond Univ, Robina, Qld, Australia
[4] Radboud Univ Nijmegen, Med Ctr, Radboud Inst Hlth Sci, Nijmegen, Netherlands
[5] Univ Toronto, Toronto, ON, Canada
[6] Monash Univ, Melbourne, Vic, Australia
[7] Univ Hull, Kingston Upon Hull, England
[8] Univ Washington, Dept Family Med, Box 356390, Seattle, WA 98195 USA