1. Department of Pediatrics; School of Medicine; Fukuoka University; Fukuoka Japan
2. Division of Neonatology; Center for Maternal, Fetal and Neonatal Medicine; Fukuoka University Hospital; Fukuoka Japan
3. Department of Pediatric Imaging; Tokyo Metropolitan Children's Medical Center; Tokyo Japan
4. Department of Pediatrics; Fukuoka University Chikushi Hospital; Fukuoka Japan