Rating the quality of evidence is by necessity a matter of judgment

Affiliations

• ¹ Mayo Clinic, Department of Knowledge and Evaluation Research Unit, 200 1st ST SW, Rochester, MN 55905, USA. Electronic address: [email protected].
• ² Department of Medicine and Biomedical & Health Informatics at the University of Missouri-Kansas City, MO, USA.
• ³ Department of Clinical Epidemiology & Biostatistics, McMaster University, Ontario, Canada.
• ⁴ Department of Medicine, University of Minnesota, Minneapolis, MN, USA.
• ⁵ Department of Medicine, Case Western Reserve University, Cleveland, OH, USA.
• ⁶ Department of Urology, University of Minnesota, Minneapolis, MN, USA.