[1] Hokkaido Univ, Grad Sch Med, Hokkaido Univ Hosp, Dept Pediat, Sapporo, Hokkaido, Japan
[2] Osaka Med Ctr, Dept Pediat, Izumi, Japan
[3] Res Inst Maternal & Child Hlth, Izumi, Japan
[4] Nagoya Univ, Grad Sch Med, Dept Pediat, Nagoya, Aichi, Japan
[5] Kanazawa Univ, Sch Med, Fac Med, Sch Hlth Sci, Kanazawa, Ishikawa, Japan
[6] Kochi Med Sch, Dept Pediat, Nankoku, Kochi, Japan
[7] Kochi Med Sch, Dept Mol Microbiol & Infect, Nankoku, Kochi, Japan
[8] Kyushu Univ, Sch Med, Grad Sch Med Sci, Dept Pediat, Fukuoka, Japan
[9] Toyama Med & Pharmaceut Univ, Dept Pediat, Toyama, Japan
[10] Tohoku Univ, Inst Dev Aging & Canc, Dept Pediat, Sendai, Miyagi, Japan
[11] Tokyo Med & Dent Univ, Grad Sch, Dept Pediat & Dev Biol, Tokyo, Japan
[12] Yokohama City Univ, Sch Med, Dept Pediat, Yokohama, Kanagawa, Japan
[13] Takasago Seibu Hosp, Dept Pediat, Takasago, Hyogo, Japan