1. Department of Pathology, Medical School of Hannover, Hannover, Germany.
2. Institute of Pathology, University of Graz, Graz, Austria.
3. Department of Nuclear Medicine, Medical School of Hannover, Hannover, Germany.
4. Department of Internal Medicine II, Ludwigs-Maximilians University, Munich, Germany.
5. Experimental and Clinical Endocrinology, Medical Clinic I, University of Lübeck, Lübeck, Germany
6. The Christie, Manchester, United Kingdom.