1. Department of Internal Medicine, Division of Endocrinology and Diabetology, Endocrinology Lab Platform, Medical University of Graz, Graz, Austria
2. Clinical Biochemistry, Hormones and Tumor Markers Section, Laboratori de Referència de Catalunya, Barcelona, Spain
3. Agent from TRIGA-S representing Roche Diagnostics GmbH, Penzberg, Germany
4. Roche Diagnostics GmbH, Penzberg, Germany
5. Study Department, MVZ Labor Dr. Limbach & Kollegen, Heidelberg, Germany