1. Department of Internal Medicine, Section of Endocrinology and Metabolism, Leiden University Medical Center, Leiden, Netherlands
2. Endocrine Research Unit, Mayo School of Graduate Medical Education, Center for Translational Science Activities, Mayo Clinic, Rochester, Minnesota
3. Department of Primary Care Internal Medicine, Mayo Clinic, Rochester, Minnesota
4. Division of Endocrinology, Mayo Clinic, Rochester, Minnesota
5. Department of Internal Medicine, Tulane University Health Sciences Center, New Orleans, Louisiana