1 Department of Clinical Epidemiology and Biostatistics, McMaster University, Hamilton, Ontario L8N 3Z5, Canada; Department of Medicine, McMaster University, Hamilton, Ontario L8N 3Z5, Canada. Electronic address: [email protected].
2 Norwegian Knowledge Centre for the Health Services, PO Box 7004, St Olavs plass, 0130 Oslo, Norway.
3 Academy of Swiss Insurance Medicine (asim), University Hospital Basel, Petergraben 4, CH-4031 Basel, Switzerland; Basel Institute of Clinical Epidemiology, University Hospital Basel, Hebelstrasse 10, 4031 Basel, Switzerland.
4 Department of Clinical Epidemiology and Biostatistics, McMaster University, Hamilton, Ontario L8N 3Z5, Canada.
5 Iberoamerican Cochrane Center-Servicio de Epidemiologıa Clınica y Salud Pública and CIBER de Epidemiologıa y Salud Pública (CIBERESP), Hospital de Sant Pau, Universidad Autónoma de Barcelona, Barcelona 08041, Spain.
6 Department of Medicine, Harvard Medical School, Boston, USA.
7 Knowledge and Encounter Research Unit, Mayo Clinic, Rochester, MN, USA.
8 Department of Medicine, Karolinska Institute M54, Karolinska University Hospital, 141 86 Stockholm, Sweden.
9 Department of Medicine, McMaster University, Hamilton, Ontario L8N 3Z5, Canada.
10 Durham VA Center for Health Services Research in Primary Care, Duke University Medical Center, Durham, NC 27705, USA.
11 Effective Health Care Research Consortium, Liverpool School of Tropical Medicine, Liverpool L3 5QA, UK.
12 Department of Medicine, Division of Gastroenterology, Case and VA Medical Center, Case Western Reserve University, Cleveland, OH 44106, USA.
13 German Cochrane Center, Institute of Medical Biometry and Medical Informatics, University Medical Center Freiburg, 79104 Freiburg, Germany; Division of Pediatric Hematology and Oncology, Department of Pediatric and Adolescent Medicine, University Medical Center Freiburg, 79106 Freiburg, Germany.
14 National Collaborating Centre for Mental Health, Centre for Outcomes Research and Effectiveness, Research Department of Clinical, Educational & Health Psychology, University College London, 1-19 Torrington Place, London WC1E 7HB, UK.
15 Vanderbilt Evidence-based Practice Centre, Vanderbilt University, Nashville, Tennessee.