1. Department of Cardiovascular Medicine, Shinshu University
School of Medicine, Asahi, Matsumoto, Japan, ybm1965@shinshu-u.ac.jp
2. Division of Cardiology and Catheterization Laboratories,
Shonan Kamakura General Hospital, Kamakura, Japan
3. Cardiology of Kikuna Memorial Hospital, Kawasaki, Japan
4. Cardiology of Kansai Rousai Hospital, Koube, Japan