1. Department of Pediatrics, Hamamatsu University School of Medicine, Hamamatsu, Japan;
2. Centre for Cardiovascular Science, The Queen’s Medical Research Institute, University of Edinburgh, Edinburgh, Scotland;
3. Department of Pediatrics, Seirei Hamamatsu General Hospital, Hamamatsu, Japan; and
4. Department of Pediatrics, Iwata City Hospital; Iwata, Japan