[1] Natl Ctr Child Hlth & Dev, Tokyo, Japan
[2] Toyama Med & Pharmaceut Univ, Toyama, Japan
[3] Fukuoka Natl Hosp, NHO, Fukuoka, Japan
[4] Minami Okayama Med Ctr, NHO, Okayama, Japan
[5] Kawasaki Municipal Tama Hosp, Kanagawa, Japan
[6] Sagamihara Natl Hosp, NHO, Kanagawa, Japan