1. Graduate School of Medical Science; Department of Obstetrics and Gynecology; Kyoto Prefectural University of Medicine; Kyoto Japan
2. Department of Gynecology; Saiseikai Nagasaki Hospital; Nagasaki Japan
3. Department of Obstetrics and Gynecology; Nagasaki University Graduate School of Biomedical Sciences; Nagasaki Japan
4. Department of Tumor and Diagnostic Pathology; Atomic Bomb Disease Institute; Nagasaki Japan
5. Center for Quality Assurance in Research and Development; Kyoto Prefectural University of Medicine; Kyoto Japan