[1] Department of Paediatrics,
[2] Faculty of Medicine,undefined
[3] Kyushu University,undefined
[4] 3–1-1 Maidashi,undefined
[5] Higashiku,undefined
[6] Fukuoka 812–8582,undefined
[7] Japan Tel.: +81-92-6425421; Fax: +88-92-6425435,undefined
[8] Department of Medical Informatics,undefined
[9] Faculty of Medicine,undefined
[10] Kyushu University,undefined
[11] Fukuoka,undefined
[12] Japan,undefined
[13] Department of Paediatrics,undefined
[14] Kyushu Kouseinenkin Hospital,undefined
[15] Fukuoka,undefined
[16] Japan,undefined