1. Department of Obstetrics and Gynecology, Kameda Medical Center
2. Department of Surgery, Iwate Prefectural Iwai Hospital
3. Department of Obstetrics and Gynecology, Suzuki Memorial Hospital
4. Department of Obstetrics and Gynecology, Tohoku University Hospital
5. Department of Obstetrics and Gynecology, Iwate Prefectural Iwai Hospital
6. Department of Palliative Medicine, Iwate Prefectural Iwai Hospital