1. Department of Preventive Medicine; Medical Research Institute, Kitano Hospital; Osaka Japan
2. Department of Community Medicine; Kumamoto University School of Medicine; Kumamoto Japan
3. Department of Medical Engineering; Himeji Dokkyo University, Faculty of Health Sciences; Himeji Japan
4. Department of Gynecology and Obstetrics; Medical Research Institute, Kitano Hospital; Osaka Japan
5. Department of Gynecology and Obstetrics; Graduate School of Medicine and Faculty of Medicine Kyoto University; Kyoto Japan