*Corresponding author:
Masaharu Masuda
Kansai Rosai Hospital Cardiovascular Center
3-1-69 Inabaso, Amagasaki-shi, Hyogo 660-8511, Japan
Tel: +81-6-6416-1221
Fax: +81-6-6419-1870
E-mail: masuda-masaharu@kansaih.johas.go.jp