1. Division of Endocrinology, Georgetown University, Washington, District of Columbia, USA.
2. Section of Adult and Pediatric Endocrinology and Metabolism, University of Chicago, Chicago, Illinois, USA.
3. Division of Endocrinology, Diabetes, and Metabolism, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA.
4. Division of Endocrinology, Diabetes and Metabolism, Virginia Commonwealth University, Richmond, Virginia, USA.
5. Department of Endocrinology and Metabolism, Amsterdam Gastroenterology Endocrinology Metabolism, Amsterdam University Medical Center, Netherlands.
6. Department of Endocrinology, Diabetes and Metabolism, University Duisburg-Essen, Essen, Germany.
7. Division of Endocrinology, Rush University, Chicago, Illinois, USA.
8. Center for Endocrinology and Metabolism, Department Internal Medicine, Herlev and Gentofte Hospitals, Herlev, Denmark.
9. Division of Endocrinology, University Health Network and University of Toronto, Toronto, Canada.
10. Department of Endocrinology, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark.
11. Thyroid Research Group, School of Medicine, Cardiff University, Cardiff, United Kingdom.