1. Department of Pediatrics; Yamaguchi University Graduate School of Medicine; Ube Japan
2. Division of Pediatrics; Yamaguchi Red Cross Hospital; Yamaguchi Japan
3. Department of Pediatrics; Graduate School of Medical Sciences; Kyushu University; Fukuoka Japan
4. Department of Clinical Chemistry and Laboratory Medicine; Kyushu University Hospital; Fukuoka Japan
5. Department of Pediatrics; University of Occupational and Environmental Health; Kitakyushu Japan