1. Department of Nursing School of Nursing Shonan Kamakura University of Medical Sciences Kanagawa Japan
2. Department of Obstetrics and Gynecology Teikyo University School of Medicine Hospital Mizonokuchi Kanagawa Japan
3. Department of Obstetrics and Gynecology Saitama Ika Daigaku Sogo Iryo Center Saitama Japan
4. Center for Advanced Reproduction St. Luke's International University Hospital, Tokyo Japan
5. Graduate School of Nursing Kyoto Tachibana University Kyoto Japan
6. Department of Nursing School of Nursing Josai International University Chiba Japan
7. Department of Nursing Tokyo University of Technology School of Health Sciences Tokyo Japan
8. Denentoshi Ladies Clinic Kanagawa Japan