[1] McMaster Univ, Sch Rehabil Sci, Fac Hlth Sci, Hamilton, ON, Canada
[2] Hosp Gen Mexico City, Dept Reumatol, Mexico City, DF, Mexico
[3] McMaster Univ, McMaster Hlth Forum, Hamilton, ON, Canada
[4] McMaster Univ, Dept Clin Epidemiol & Biostat, Hamilton, ON, Canada
[5] McMaster Univ, Ctr Hlth Econ & Policy Anal, Hamilton, ON, Canada
[6] McMaster Univ, Dept Polit Sci, Hamilton, ON, Canada
[7] Harvard Univ, Harvard Sch Publ Hlth, Dept Global Hlth & Populat, Boston, MA 02115 USA
[8] Univ Autonoma Nuevo Leon, Hosp Univ, Dept Reumatol, Monterrey, Mexico
[9] Hosp Reg Alta Especialidad Peninsula Yucatan, Unidad Invest, Merida, Mexico
[10] Univ Autonoma Nuevo Leon, Ctr Univ Salud, Fac Med, Monterrey, Mexico
[11] Univ Autonoma Nuevo Leon, Fac Enfermeria, Ctr Invest & Desarrollo Ciencias Salud, Monterrey, Mexico