1. Endocrine Practice, Molecular Laboratory, Heidelberg, Germany.
2. Department of Surgery, Martin Luther University Halle, Halle, Germany.
3. Department of Nuclear Medicine, University of Würzburg, Würzburg, Germany.
4. Institute of Pathology and Neuropathology, University Hospital of Essen, University of Duisburg-Essen, Essen, Germany.