1. Division of Cardiovascular Medicine, Toho University Ohashi Medical Center, 2-22-36 Ohashi, Meguro-ku, Tokyo, Japan
2. Department of Therapeutic Strategy for Heart Failure, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongou, Bunkyo-ku, Tokyo, Japan
3. Department of Obstetrics and Gynecology, Faculty of Medicine, The University of Tokyo, 7-3-1 Hongou, Bunkyo-ku, Tokyo, Japan