1. Department of CardiologyTokyo Metropolitan Hiroo HospitalTokyo Japan
2. Health Care Center, Internal Medicine and Cardiology, Kanto Gakuin UniversityYokohama Kanagawa Japan
3. Department of Cardiology, Tokyo Metropolitan Health and Medical Treatment Corporation Ohkubo HospitalTokyo Japan
4. Department of Cardiology, Tokyo Medical and Dental, UniversityTokyo Japan