1. Evidence-based Practice Center, Mayo Clinic, Rochester, Minnesota 55905
2. Division of Gastroenterology, Washington University School of Medicine, St. Louis, Missouri 36110
3. Division of Pediatric Endocrinology, Sanford Children Specialty Clinic, University of South Dakota, Sioux Falls, South Dakota 57105
4. Division of Diabetes, Endocrinology & Metabolism, Vanderbilt University Medical Center, Nashville, Tennessee 37232
5. Mayo Clinic Libraries, Mayo Clinic, Rochester, Minnesota 55905