1. Institute of Medical Informatics, Justus-Liebig-University of Giessen, Giessen, Germany,
2. Commission on Cancer, American College of Surgeons, Chicago, Ill
3. Clinic and Policlinic for Nuclear Medicine of the University of Wurzburg, Wurzburg, Germany
4. Institute of Medical Informatics, Justus-Liebig-University of Giessen, Giessen, Germany