1. Department of Cardiology, Yokohama General Hospital, Japan
2. Department of Cardiology, Tokyo Metropolitan Health and Medical Treatment Corporation Ohkubo Hospital, Japan
3. Division of Cardiovascular Medicine, Toho University Medical Center Ohashi Hospital, Japan
4. Department of Cardiology, Tokyo Metropolitan Hiroo Hospital, Japan
5. Department of Cardiology, Tokyo Metropolitan Tama Medical Center, Japan
6. Department of Cardiology, Yokohama Minami Kyosai Hospital, Japan
7. Department of Cardiology, Toride Kitasohma Medical Center Hospital, Japan