Affiliation: | 1. Department of Pediatrics, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan;2. Department of Pediatrics, National Hospital Organization Okayama Medical Center, Okayama, Japan;3. Department of Pediatrics, Okayama University Hospital, Okayama, Japan;4. Department of Pediatrics, Okayama Saiseikai General Hospital, Okayama, Japan |