[1] Osaka City Univ, Dept Publ Hlth, Grad Sch Med, Abeno Ku, 1-4-3 Asahi Machi, Osaka 5458585, Japan
[2] Fukuoka Nursing Coll, Div Basic Nursing, Sawara Ku, 2-15-1 Tamura, Fukuoka, Fukuoka 8140193, Japan
[3] Mouri Clin, Dept Pediat, 14017-5 Mimasaka,Yamauchi Cho, Takeo City, Saga 8492303, Japan
[4] Kariya Toyota Gen Hosp, Dept Pediat, 5-15 Sumiyoshi Cho, Kariya, Aichi 4488505, Japan
[5] Miyazaki Prefectural Miyazaki Hosp, Dept Pediat, 5-30 Kita Takamatsu Cho, Miyazaki, Miyazaki 8808510, Japan
[6] Saiwai Kodomo Clin, Dept Pediat, 1-11-3 Saiwai Cho, Tachikawa, Tokyo 1900002, Japan
[7] Tokyo Saiseikai Cent Hosp, Dept Pediat, Minato Ku, 1-4-17 Mita, Tokyo 1080073, Japan
[8] Natl Hosp Org Fukuoka Natl Hosp, Dept Pediat, Minami Ku, 4-39-1 Yakatabaru, Fukuoka, Fukuoka 8111394, Japan
[9] Kameda Med Ctr, Dept Pediat, 929 Higashi Cho, Kamogawa City, Chiba 2968602, Japan
[10] Dept Pediat, Ohta Pediat Clin, 7323-1 Takeo,Takeo Cho, Takeo City, Saga 8430022, Japan
[11] Kasahara Pediat Clin, Dept Pediat, 2-205 Oowada, Fukui, Fukui 9100836, Japan
[12] Nakamura Pediat Clin, Dept Pediat, 6-179 Oshino, Nonoichi, Ishikawa 9218802, Japan
[13] Hasui Pediat Clin, Dept Pediat, 105 Ryusuke Cho, Komatsu City, Ishikawa 9230926, Japan
[14] Fujita Hlth Univ, Sch Med, Dept Pediat, 1-98 Dengakugakubo,Kutsukake Cho, Toyoake, Aichi 4701192, Japan
[15] Kawasaki Med Sch, Dept Pediat, Gen Med Ctr, Kita Ku, 2-6-1 Nakasange, Okayama, Okayama 7008505, Japan
[16] Ekinishi Hlth & Welf Ctr, 3-4-25 Sainenn, Kanazawa, Ishikawa 9208533, Japan
[17] Saga Univ, Fac Med, Dept Prevent Med, 5-1-1 Nabeshima, Saga, Saga 8498501, Japan
[18] Med Co LTA SOUSEIKAI, Clin Epidemiol Res Ctr, Higashi Ku, 3-5-1 Kashii Teriha, Fukuoka, Fukuoka 8130017, Japan