1. Institute of Pathology, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
2. College of Arts and Sciences, Boston University, Boston, MA 02215, USA
3. Department of Medical Biometry and Epidemiology, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
4. Institute of Pathology, Clinical Center Osnabrück, 49076 Osnabrück, Germany
5. Department of Gynecology, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
6. Department of Gynecology, Albertinen Clinic Schnelsen, 22457 Hamburg, Germany
7. Department of Gynecology, Amalie Sieveking Clinic, 22359 Hamburg, Germany
8. Department of Gynecology, Regio Clinic Pinneberg, 25421 Pinneberg, Germany
9. Department of Gynecology, Clinical Centre Itzehoe, 25524 Itzehoe, Germany
10. Breast Center Osnabrück, 49076 Osnabrück, Germany