1. Johns Hopkins Bloomberg School of Public Health; Department of Epidemiology; Room W6138 615 N. Wolfe St. Baltimore Maryland USA 21205
2. Medical Center - University of Freiburg; Institute for Evidence in Medicine (for Cochrane Germany Foundation); Breisacher Straße 153 Freiburg Germany 79110
3. UCLPartners; 170 Tottenham Court Road 3rd floor, UCLPartners London London UK W1T 7HA
4. Medical Center - Univ. of Freiburg, Faculty of Medicine, Univ. of Freiburg; Evidence in Medicine / Cochrane Germany; Breisacher Straße 153 Freiburg Germany 79110
5. Faculty of Medicine and Medical Center, University of Freiburg; Institute for Medical Biometry and Statistics; Stefan-Meier-Str. 26 Freiburg Germany D-79104
6. Lausanne University Hospital; Cochrane Switzerland, Institute of Social and Preventive Medicine; Route de la Corniche 10 Lausanne Switzerland CH-1010