| Affiliation: | 1. Department of Pediatrics, Okayama University Hospital, Okayama, Japan;2. Correspondence to:;3. Dr. Kosei Hasegawa, Department of Pediatrics, Okayama University Hospital, 2‐5‐1, Shikata‐cho, Kita‐Ku, Okayama 700‐8558, Japan.;4. E‐mail:;5. Department of Neonatalogy, Hiroshima Prefectural Hospital, Hiroshima, Japan;6. Department of Pediatrics, Iwakuni Clinical Center, National Hospital Organization, Iwakuni, Japan;7. Department of Pediatrics, Okayama Saiseikai General Hospital, Okayama, Japan;8. Department of Pediatrics, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan |
