1 Basel Institute for Clinical Epidemiology and Biostatistics, University Hospital of Basel, Switzerland Academy of Swiss Insurance Medicine, University Hospital Basel, Basel, Switzerland.
2 Department of Oncology, University Hospital of Basel, Switzerland.
3 Cochrane Switzerland, Institute of Social and Preventive Medicine (IUMSP), Lausanne University Hospital, Lausanne, Switzerland.
4 Department of Clinical Epidemiology and Biostatistics, McMaster University, Hamilton, Canada Department of Medicine, McMaster University, Hamilton, Canada.
5 German Cochrane Centre, Medical Center-University of Freiburg, Freiburg, Germany.
6 Epidemiology, Biostatistics and Prevention Institute, University of Zurich, Zurich, Switzerland.
7 Basel Institute for Clinical Epidemiology and Biostatistics, University Hospital of Basel, Switzerland.
8 Department of Health and Society, Austrian Federal Institute for Health Care, Vienna, Austria.
9 Department of Clinical Epidemiology and Biostatistics, McMaster University, Hamilton, Canada Departments of Urology and Public Health, Helsinki University Hospital and University of Helsinki, Helsinki, Finland.
10 Department of Clinical Epidemiology and Biostatistics, McMaster University, Hamilton, Canada Department of Internal Medicine, Pontificia Universidad Catolica de Chile, Santiago, Chile.
11 Department of Clinical Epidemiology and Biostatistics, McMaster University, Hamilton, Canada Evidence-Based Dentistry Unit, Faculty of Dentistry, Universidad de Chile, Santiago, Chile.
12 Department of Clinical Epidemiology and Biostatistics, McMaster University, Hamilton, Canada.
13 Department of Clinical Epidemiology and Biostatistics, McMaster University, Hamilton, Canada Department of Medicine, McMaster University, Hamilton, Canada Michael G. DeGroote Institute for Infectious Diseases Research, McMaster University, Hamilton, Canada.
14 Department of Clinical Epidemiology and Biostatistics, McMaster University, Hamilton, Canada Department of Internal Medicine, American University of Beirut, Beirut, Lebanon Department of Medicine, State University of New York at Buffalo, Buffalo, USA.
15 Department of Clinical Epidemiology and Biostatistics, McMaster University, Hamilton, Canada Chinese Evidence-Based Medicine Center, West China Hospital, Sichuan University, Chengdu, China.
16 Department of Neonatolgy, University Hospital Zurich, Zurich, Switzerland.
17 Department of Clinical Epidemiology and Biostatistics, McMaster University, Hamilton, Canada Department of Anesthesia, McMaster University, Hamilton, Canada Michael G. DeGroote Institute for Pain Research and Care, McMaster University, Hamilton, Canada.
18 Epidemiology Unit, Department of Cardiology, Vall d'Hebron Hospital and CIBER de Epidemiología y Salud Publica (CIBERESP), Barcelona, Spain.
19 Centre de Recherche Clinique du Centre Hospitalier Universitaire de Sherbrooke, Université de Sherbrooke, Sherbrooke, Canada.
20 Basel Institute for Clinical Epidemiology and Biostatistics, University Hospital of Basel, Switzerland Institute of Nuclear Medicine, University Hospital Bern, Bern, Switzerland.
21 IRCCS Orthopedic Institute Galeazzi, Milan, Italy.
22 Department of Surgery, University Hospital Basel, Switzerland.
23 Department of Clinical Epidemiology and Biostatistics, McMaster University, Hamilton, Canada Department of Anesthesia and Pain Medicine, Hospital for Sick Children Research Institute, Hospital for Sick Children, Toronto, Canada Department of Anesthesia, McMaster University, Hamilton, Canada Stanford Prevention Research Center, Stanford University, Stanford, USA.
24 Department of Medicine, Innlandet Hospital Trust-Division Gjøvik, Oppland, Norway.
25 Department of Clinical Epidemiology and Biostatistics, McMaster University, Hamilton, Canada Department of Anesthesia and Pain Medicine, Hospital for Sick Children Research Institute, Hospital for Sick Children, Toronto, Canada Institute of Health Policy, Management and Evaluation, University of Toronto, Toronto, Canada.
26 Institute of Nuclear Medicine, University Hospital Bern, Bern, Switzerland.
27 Basel Institute for Clinical Epidemiology and Biostatistics, University Hospital of Basel, Switzerland Department of Clinical Epidemiology and Biostatistics, McMaster University, Hamilton, Canada Department of Clinical Research, University of Basel, Switzerland.
28 Basel Institute for Clinical Epidemiology and Biostatistics, University Hospital of Basel, Switzerland Department of Oncology, University Hospital of Basel, Switzerland Department of Medical Oncology, Royal Marsden Hospital, London, UK.