1. Medical Department II; St. Vincent Hospital Vienna; Vienna Austria
2. Division of Endocrinology and Metabolism; Medical University of Graz; Graz Austria
3. Department of Physiology, Anatomy and Neuroscience; University of Szeged; Szeged Hungary
4. Department of Diagnostic and Interventional Radiology; St. Vincent Hospital Vienna; Vienna Austria
5. Labcon-Medical Laboratories Ltd.; St. Vincent Group; Vienna Austria