[1] McMaster Univ, Dept Hlth Res Methods Evidence & Impact, 1280 Main St W, Hamilton, ON L8S 4L8, Canada
[2] Queens Univ, Dept Family Med, Kingston, ON, Canada
[3] WHO, Dept Hlth Prod Policy & Stand, Geneva, Switzerland
[4] London Sch Econ & Polit Sci, Dept Hlth Policy, London, England
[5] South African Med Res Council, Hlth Syst Res Unit, Cape Town, South Africa
[6] Stellenbosch Univ, Fac Med & Hlth Sci, Dept Med, Div Clin Pharmacol, Stellenbosch, South Africa
[7] Stellenbosch Univ, Fac Med & Hlth Sci, Dept Global Hlth, Div Epidemiol & Biostat, Stellenbosch, South Africa
[8] Univ Cologne, Inst Publ Hlth, Fac Med, Cologne, Germany
[9] Univ Hosp Cologne, Univ Cologne, Cologne, Germany
[10] Mario Negri Inst Pharmacol Res, IRCCS, Milan, Italy
[11] Univ Milan, Dept Oncol & Hematol, Milan, Italy
[12] IRCCS, European Inst Oncol, Milan, Italy
[13] Stellenbosch Univ, Fac Med & Hlth Sci, Dept Global Hlth Ctr Evidence Based Hlth Care, Dept Global Hlth,Ctr Evidence Based Hlth Care, Cape Town, South Africa
[14] McMaster Univ, McMaster Hlth Forum, Hamilton, ON, Canada
[15] Univ Johannesburg, Africa Ctr Evidence, Johannesburg, South Africa
[16] Amer Univ Beirut, Dept Internal Med, Beirut, Lebanon
[17] IRCCS Ist Sci Neurolog Bologna, Unit Epidemiol & Stat, Bologna, Italy
[18] WHO Collaborating Ctr Evidence Based Res Synth &, Reg Emilia Romagna, Bologna, Italy
[19] McMaster Univ, Mike Gent Chair Healthcare Res, Dept Res Methods Evidence & Impact, Hamilton, ON, Canada
[20] Multiple Sclerosis Int Federat, London, England
[21] Humanitas Univ, Dept Biomed Sci, Milan, Italy
[22] McMaster Univ, Dept Med, Hamilton, ON, Canada
[23] Humanitas Univ, Clin Epidemiol & Res Ctr Dept Biomed Sci, Ctr Osteopath Med Collaborat, Via Rita Levi Montalcini 4, I-20090 Pieve Emanuele, Milano, Italy