1. Departments of Pathology, Oncology and Gynecology/Obstetrics, Johns Hopkins University School of Medicine, Baltimore, MD 21231, USA
2. Gynecologic Cancer Center, Department of Obstetrics and Gynecology, Cathay General Hospital, Jen-Ai Road, Taipei 10630, Taiwan
3. Department of Obstetrics and Gynecology, Shimane University School of Medicine, Enyacho 89-1, Izumo 693-8501, Japan
4. Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, The Ohio State University, Comprehensive Cancer Center, Arthur G. James Cancer Hospital and Richard J. Solove Research Institute, Columbus, OH 43210, USA