Author Affiliations: Department of Pediatrics, Hamamatsu University School of Medicine, Japan (Iijima S, Ohzeki T)

Corresponding Author: Shigeo Iijima, MD, Department of Pediatrics, Hamamatsu University School of Medicine, 1-20-1 Handayama, Higashi-ku, Hamamatsu, Shizuoka 431-3192, Japan (Tel/Fax: +81 53 435 2312; Email: sige_pd@yahoo.co.jp)