1. Institute of Pathology, University Medical Center Hamburg-Eppendorf
2. General, Visceral and Thoracic Surgery Department and Clinic
3. Department of Gynecology, University Medical Center Hamburg-Eppendorf
4. Department of Gynecology, Regio Clinic Pinneberg, Pinneberg
5. Department of Gynecology, Regio Clinic Itzehoe, Itzehoe
6. Clinical Center Osnabrueck, Institute of Pathology, Osnabrueck
7. Department of Pathology, Academic Hospital Fuerth, Fuerth, Germany