[1] McMaster Univ, Sch Rehabil Sci, Hamilton, ON, Canada
[2] Hosp Gen Mexico Eduardo Liceaga, Dept Reumatol, Mexico City, DF, Mexico
[3] Univ Autonoma Nuevo Leon, Ctr Univ Salud, Monterrey, Mexico
[4] Inst Mexicano Seguro Social Delegat Estatal Yucat, Merida, Mexico
[5] Inst Mexicano Seguro Social, Unidad Med Familiar 14 Quintana Roo, Cancun, Mexico
[6] Inst Mexicano Seguro Social, Unidad Med Familiar 60, Mexico City, DF, Mexico
[7] Ctr Salud Independencia Servicios Salud Morelo, Jiutepec, Mexico
[8] Hosp Univ Nuevo Leon Jose Eleuterio Gonzalez, Monterrey, Mexico
[9] Univ Anahuac Mayab, Escuela Med, Merida, Mexico
[10] McMaster Univ, Ctr Hlth Econ & Policy Anal, Dept Clin Epidemiol & Biostat, McMaster Hlth Forum, Hamilton, ON, Canada