1Royal Marsden Hospital, United Kingdom
2Basel Institute for Clinical Epidemiology and Biostatistics, University Hospital of Basel, Basel, Switzerland
3Cochrane Switzerland, Institute of Social and Preventive Medicine (IUMSP), Lausanne University Hospital, Lausanne, Switzerland
4Department of Clinical Epidemiology and Biostatistics, McMaster University, Hamilton, Ontario, Canada
5German Cochrane Centre, Medical Center – University of Freiburg, Freiburg, Germany
6Epidemiology, Biostatistics and Prevention Institute (EBPI), University of Zurich, Zurich, Switzerland
7Austrian Federal Institute for Health Care, Department of Health and Society, Vienna, Austria
8Department of Neonatology, University Hospital Zurich, Zurich, Switzerland
9Epidemiology Unit, Department of Cardiology, Vall d'Hebron Hospital and CIBER de Epidemiología y Salud Publica (CIBERESP), Barcelona, Spain
10Centre de Recherche Clinique Étienne-Le Bel and Department of Medicine, Université de Sherbrooke, Sherbrooke, Canada
11CS Orthopedic Institute Galeazzi, Milano, Italy
12Chinese Evidence-based Medicine Center, West China Hospital, Sichuan University, Chengdu, China
13Department of Medicine, Innlandet Hospital Trust-Division Gjøvik, Oppland, Norway
14Institute of Nuclear Medicine, University Hospital Bern, Bern, Switzerland