1. Research and Medical Services, Brockton/West Roxbury Veterans Administration Medical Center, the Departments of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts, USA
2. Department of Nuclear Medicine, Universitäklinikum Steglitz, West Berlin, FRG
3. Department of Surgery, Universitäklinikum Steglitz, West Berlin, FRG
4. Sandoz AG, Klinische Forschung, Nuremberg, FRG