[1] Tokai Univ, Hiratsuka, Kanagawa 25912, Japan
[2] Sakakibara Heart Inst, Dept Cardiol, Tokyo, Japan
[3] Keio Univ, Tokyo, Japan
[4] Tokyo Metropolitan Tama Ctr, Tokyo, Japan
[5] Musashino Red Cross Hosp, Tokyo, Japan
[6] Kyorin Univ, Sch Med, Tokyo, Japan
[7] Nihon Univ, Tokyo, Japan
[8] Nippon Med Sch, Tokyo 113, Japan