1. Department of Neonatology; NHO Okayama Medical Center; Okayama Japan
2. Department of Obstetrics and Gynecology; NHO Okayama Medical Center; Okayama Japan
3. Department of Otolaryngology; NHO Okayama Medical Center; Okayama Japan
4. Department of Pediatrics; Okayama University Hospital; Okayama Japan
5. Department of Pediatrics; Okayama Saiseikai General Hospital; Okayama Japan
6. Department of Medical Science Mathematics; Medical Research Institute; Tokyo Medical and Dental University; Tokyo Japan
7. Laboratory for Medical Science Mathematics; RIKEN Center for Integrative Medical Sciences; Yokohama Japan
8. Department of Medical Genetics; Osaka Women's and Children's Hospital; Osaka Japan