[1] St Marianna Univ, Dept Nursing, Sch Med, 2-16-1 Sugao Miyamae, Kawasaki, Kanagawa 2168511, Japan
[2] St Marianna Univ, Dept Internal Med, Div Cardiol, Sch Med, 2-16-1 Sugao Miyamae, Kawasaki, Kanagawa 2168511, Japan
[3] St Marianna Univ, Dept Internal Med, Div Cardiol, Sch Med,Yokohama City Seibu Hosp,Asahi Ku, 1197-1 Yasachi Chou, Yokohama, Kanagawa 2410811, Japan