Corrigendum to GRADE guidelines 6. Rating the quality of evidence-imprecision. J Clin Epidemiol 2011;64:1283-1293

Affiliations

• 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: guyatt@mcmaster.ca.
• 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.