1. 1Division of Molecular Pharmacology, National Cancer Center Research Institute, Chuo-ku, Tokyo, Japan.
2. 2Department of Gynecologic Oncology, Saitama Medical University International Medical Center, Hidaka-City, Saitama, Japan.
3. 3Department of Medical Oncology, National Cancer Center Hospital, Chuo-ku, Tokyo, Japan.
4. 4Department of Diagnostic Pathology, National Cancer Center Hospital, Chuo-ku, Tokyo, Japan.
5. 5Department of Medical Oncology and Translational Research, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan.
6. 6Department of Pathology, Saitama Medical University International Medical Center, Hidaka-City, Saitama, Japan.
7. 7Discovery Research Laboratories I, Daiichi Sankyo Co., Ltd., Shinagawa-ku, Tokyo, Japan.
8. 8Clinical Development Department II, Daiichi Sankyo Co., Ltd., Shinagawa-ku, Tokyo, Japan.