[1] Univ Melbourne, Melbourne Sch Populat & Global Hlth, Ctr Hlth Equ, Melbourne, Vic 3010, Australia
[2] Univ Sydney, Ctr Disabil Res & Policy, Fac Hlth Sci, Lidcombe 2141, Australia
[3] Univ Lancaster, Fac Hlth & Med, Ctr Disabil Res, Lancaster LA1 4YG, England
[4] Univ Melbourne, Ctr Epidemiol & Biostat, Melbourne Sch Populat & Global Hlth, Melbourne, Vic 3010, Australia
[5] Deakin Univ, Sch Hlth & Social Dev, Burwood 3125, Australia
[6] Univ Melbourne, Melbourne Sch Populat & Global Hlth, Ctr Mental Hlth, Melbourne, Vic 3010, Australia
[7] Stanford Univ, Sch Med, Ctr Hlth Policy PCOR, Stanford, CA 94305 USA
[8] Stanford Law Sch, Stanford, CA 94305 USA