[1] Tokushima Univ Hosp, Dept Cardiol, Tokushima, Japan
[2] Univ Tokushima, Dept Cardiodiabet Med, Tokushima 770, Japan
[3] Univ Tokyo, Div Hlth Serv Promot, Tokyo, Japan
[4] Univ Tokyo, Dept Cardiovasc Med, Tokyo, Japan
[5] Tokyo Univ Hosp, Dept Pediat, Tokyo 113, Japan