1 Department of Pediatrics and Child Health, Kurume University School of Medicine, 67 Asahi-Machi, Kurume, Fukuoka, 830-0011, Japan.
2 Department of Radiology, Kurume University School of Medicine, 67 Asahi-Machi, Kurume, Fukuoka, 830-0011, Japan.
3 Institute of Fundamental Medicine and Biology, OpenLab, Gene and Cell Technologies, Kazan Federal University, Kazan, 42000, Russia.
4 Department of Pediatrics and Child Health, Kurume University School of Medicine, 67 Asahi-Machi, Kurume, Fukuoka, 830-0011, Japan. yasukoga@med.kurume-u.ac.jp.