1. Clinical Biostatistics Unit; Hospital Universitario Ramón y Cajal (IRYCIS). CIBER Epidemiology and Public Health (CIBERESP); Madrid Spain
2. Institute of Public Health; University of Cambridge ; Cambridge UK
3. Iberoamerican Cochrane Centre, Biomedical Research Institute Sant Pau (IIB Sant Pau); CIBER Epidemiología y Salud Pública (CIBERESP); Barcelona Spain
4. Argentine Cochrane Centre; Institute for Clinical Effectiveness and Health Policy (IECS-CONICET); Buenos Aires Argentina
5. Neurosciences; Hospital Infantil Universitario de San José-FUCS; Bogotá Colombia
6. School of Social and Community Medicine; University of Bristol; Bristol UK
7. Iberoamerican Cochrane Centre, Biomedical Research Institute Sant Pau (IIB Sant Pau), Universitat Autònoma de Barcelona; CIBER Epidemiología y Salud Pública (CIBERESP); Barcelona Spain
8. Department of Psychological Medicine; University of Auckland; Auckland New Zealand