1. Southern Tohoku General Hospital Department of Gynecology, , 7-115 Yatsuyamada, Koriyama, Fukushima 963-8563, Japan
2. Fukushima Medical University School of Medicine Department of Reginal Gynecologic Oncology, , 1 Hikarigaoka, Fukushima, Fukushima 960-1295, Japan
3. Fukushima Medical University School of Medicine Department of Obstetrics and Gynecology, , 1-Hikarigaoka, Fukushima, Fukushima 960-1295, Japan
4. Southern Tohoku General Hospital Department of Surgery, , 7-115, Yatsuyamada, Koriyama, Fukushima 963-8563, Japan
5. Fukushima Medical University School of Medicine Department of Minimally Invasive Surgical and Medical Oncology, , 1 Hikarigaoka, Fukushima, Fukushima 960-1295, Japan
6. Southern Tohoku General Hospital Department of Urology, , 7-115 Yatsuyamada, Koriyama, Fukushima 963-8563, Japan
7. Fukushima Medical University School of Medicine Department of Regional Medical Support for Obstetrics and Gynecology, , 1 Hikarigaoka, Fukushima, Fukushima 960-1295, Japan