1. Department of Pediatrics, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
2. Department of Pediatrics, Fukuoka Children's Hospital and Medical Center, Fukuoka, Japan
3. Department of Pediatrics, Faculty of Medicine and Health Sciences, Yamaguchi University, Ube, Japan
4. Department of Pediatrics, University of Occupational and Environmental Health, Kitakyushu, Japan
5. Department of Perinatal and Pediatric Medicine, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan