Emeritus Professor of Kyushu University, Director of Research and Education, National Hospital Organization, Fukuoka-Higashi Medical Center Chidori 1-1-1, Koga-city, Fukuoka 811-3195, Japan, Tel: +81-92-943-2331 (ext.# 8228), Fax: +81-92-943-6158, Email: ksueishi@fukuokae2.hosp.go.jp