1. Department of Gynecology, National Cancer Center Hospital, Tokyo, Japan.
2. Department of Breast and Medical Oncology, National Cancer Center Hospital, Tokyo, Japan.
3. Department of Medical Oncology, The Cancer Institute Hospital of Japanese Foundation of Cancer Research, Tokyo, Japan.
4. Department of Surgical Oncology, Research Institute for Radiation Biology and Medicine, Hiroshima University, Hiroshima, Japan.
5. Department of Perinatal and Woman's Medicine, Tokyo Medical and Dental University Hospital, Tokyo, Japan.