1. Departments of Endocrinology (G.M.A., M.B., R.P.F.D.), 9700 RB Groningen, The Netherlands
2. Medical Oncology (B.R.), 9700 RB Groningen, The Netherlands
3. Surgery (F.F.A.I., R.J.v.G.), 9700 RB Groningen, The Netherlands
4. Pathology (P.M.K.), University of Groningen and University Medical Center Groningen, 9700 RB Groningen, The Netherlands
5. Department of Metabolic and Endocrine Diseases (J.v.D.), University Medical Center Utrecht, 3584 CX Utrecht, The Netherlands