1. Endocrine and Diabetes Division and Department of Clinical Chemistry, University Hospital, Bern, Switzerland
2. Department of Pathology, University Hospital, Bern, Switzerland
3. Endocrine and Diabetes Division, University Hospital, Bern, Switzerland
4. Thyroid Carcinogenesis Group, University of Cambridge, Strangeways Research Laboratory, Cambridge, United Kingdom
5. Division of Medicine, University Hospital, Bern, Switzerland
6. Department of Clinical Chemistry, University Hospital, Bern, Switzerland