1. Department of Obstetrics and Gynecology, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan
2. Department of Obstetrics and Gynecology, University of California, Los Angeles
3. Department of Radiation Oncology, Stanford University School of Medicine, Stanford, California
4. California Pacific/Palo Alto Medical Foundation/Sutter Research Institute, San Francisco, California
5. Department of Obstetrics and Gynecology, University of Alabama Birmingham, Birmingham
6. Division of Gynecologic Oncology, California Pacific/Palo Alto/Sutter Health Research Institute, San Francisco