1. Department of Obstetrics and Gynecology, Tenri Hospital
2. Department of Obstetrics and Gynecology, Saiseikai Noe Hospital
3. Department of Obstetrics and Gynecology, Kyoto University
4. Department of Obstetrics and Gynecology, Kinki University
5. Department of Obstetrics and Gynecology, Graduate School of Medicine, Osaka University
6. Department of Obstetrics and Gynecology, Fujita Health University
7. Department of Diagnostic Surgical Pathology, Tenri Hospital