1. Pediatrics; Rinku General Medical Center; 2-23, Rinku Ourai Kita, Izumisano Osaka 598-8577 Japan
2. Department of Food Science and Nutrition; Mukogawa Women's University; 6-46, Ikebirakicho Nishinomiya Hyogo 663-8558 Japan
3. Osaka Medical Center and Research Institute for Maternal and Child Health; 840, Murodo-cho, Izumi Osaka 594-1101 Japan