1. Cardiology Department; Nanfang Hospital; Southern Medical University; Guangzhou; China
2. Ajou University Hospital; Suwon; Korea
3. Cardiovascular Research Foundation; New York; NY
4. Showa University Northern Yokohama Hospital; Yokohama; Japan
5. Tokai University; Kanagawa; Japan
6. University of Occupational and Environmental Health; School of Medicine; Fukuoka; Japan