1. Department of Cardiovascular Medicine, Graduate School of Medicine, The University of Tokyo
2. Cardiovascular Imaging Clinic Iidabashi
3. Department of Obstetrics and Gynecology, Odaira Memorial Tokyo Hitachi Hospital
4. Department of Obstetrics and Gynecology, The University of Tokyo
5. Department of Integrated Women’s Health, St. Luke’s International Hospital
6. Jichi Medical University