1. Knowledge and Evaluation Research Unit, Division of Endocrinology, Department of Medicine, Mayo Clinic, Rochester, Minnesota
2. Avera Research Institute & Avera Cancer Institute, Sioux Falls, South Dakota
3. Mayo Medical School, Rochester, Minnesota
4. Division of Health Care and Policy Research, Department of Health Sciences Research, Mayo Clinic, Rochester, Minnesota
5. School of Health Sciences, University of Southampton, Southampton, England, U.K.