[1] Hlth Res Consortium CISIDAT, Cuernavaca, Morelos, Mexico
[2] Univ Minnesota, Div Hlth Policy & Management, Minneapolis, MN USA
[3] Univ Ottawa, Sch Epidemiol & Publ Hlth, Ottawa, ON, Canada
[4] Stanford Univ, Sch Med, Dept Hlth Policy, Stanford, CA USA
[5] Stanford Univ, Freeman Spogli Inst Int Studies, Stanford Hlth Policy, Stanford, CA USA