1. Department of Gynecology and Obstetrics, University of Lübeck, Lübeck, Germany
2. Department of Gynecology and Obstetrics, The International Peace Maternity & Child Health Hospital of China Welfare Institute, China
3. Department of Gynecology and Obstetrics, The Women’s Hospital, School of Medicine, Zhejiang University, Zhejiang Province, People’s Republic of China
4. Endocrine, Polypeptide and Cancer Institute, Veterans Affairs Medical Center, Miami, FL, USA
5. Department of Pathology, Miller School of Medicine, University of Miami, Miami, FL, USA
6. Divisions of Hematology/Oncology and Endocrinology, Department of Medicine, Miller School of Medicine, University of Miami, Miami, FL, USA
7. Department of Gynecology and Obstetrics, Diakonissenkrankenhaus Karlsruhe Rüppurr, Karlsruhe, Germany
8. Department of Gynecology and Obstetrics, Krankenhaus Nordwest, Frankfurt am Main, Germany
9. Department of Gynecology and Obstetrics, Evangelic Hospital Bielefeld, Bielefeld, Germany