[1] Harvard Univ, Sch Med, Principles & Practice Clin Res PPCR,Dept Phys Med, Collaborat Learning Clin Res Program,Spaulding Re, 79-96 13th St, Boston, MA 02129 USA
[2] Harvard Univ, Sch Med, Massachusetts Gen Hosp, Boston, MA 02129 USA
[3] Univ Sao Paulo, Sch Med, Discipline Geriatr, Dept Internal Med, Sao Paulo, Brazil
[4] King Saud bin Abdulaziz Univ Hlth Sci, King Abdullah Int Med Res Ctr, King Khalid Hosp, NGHNGHA,Pharmaceut Care Dept, Jeddah, Saudi Arabia
[5] Univ Fed Ouro Preto, Sch Med, Dept Internal Med, Discipline Internal Med & Med Semiol, Ouro Preto, Brazil
[6] Ctr Univ Belo Horizonte Uni BH, Dept Internal Med, Discipline Pneumol, Belo Horizonte, MG, Brazil
[7] Canadian Ctr Adv Eye Therapeut, Mississauga, ON, Canada
[8] Univ Sao Paulo, Sch Med, Dept Prevent Med, Sao Paulo, Brazil
[9] Italian Sci Spine Inst ISICO, Milan, Italy
[10] Hosp Osvaldo Rezende Franco, Betim, Brazil
[11] Univ Fed Minas Gerais, Nucleo Avaliacao Tecnol Saude, Belo Horizonte, MG, Brazil
[12] Centro Hosp & Univ Coimbra, Dept Rheumatol, Coimbra, Portugal
[13] St Vincent Hosp, Dept Internal Med, Worcester, MA 01604 USA
[14] Portuguese Inst Oncol, Coimbra, Portugal
[15] Univ Sao Paulo, Sch Med, Acupuncture Ctr, Orthoped & Traumatol Inst, Sao Paulo, Brazil
[16] Univ Fed Rio Grande do Sul, Fac Med, Dept Med Sci, Porto Alegre, RS, Brazil
[17] Quintiles Transnat, Sao Paulo, Brazil
[18] Ctr Hosp Lisboa Cent, EPE, Hosp Curry Cabral, Dept Phys Med & Rehabil, Lisbon, Portugal
[19] Harvard Univ, Beth Israel Deaconess Med Ctr, Sch Med, Dept Neurol, Boston, MA 02215 USA
[20] Spaulding Rehabil Hosp, Dept Phys Med & Rehabil, Boston, MA USA
[21] Massachusetts Gen Hosp, Boston, MA 02114 USA