1. Department of Neonatology St. Mary’s Hospital Kurume Japan
2. Department of Environmental Medicine Kurume University School of Medicine Kurume Japan
3. Department of Paediatrics and Child Health Kurume University School of Medicine Kurume Japan
4. Department of Pediatrics and Neonatology Center for Human Development and Family Science Nagoya City University Graduate School of Medical Sciences Nagoya Japan
5. Department of Otolaryngology Good Sleep Centre Nagoya City University Graduate School of Medical Sciences Nagoya Japan