1 Department of Pediatrics and Child Health, Kurume University Graduate School of Medicine, Kurume, Japan. Electronic address: yasukoga@med.kurume-u.ac.jp.
2 Center for Mitochondrial Medicine and Free Radical Research, Changhua Christian Hospital, Changhua, Taiwan. Electronic address: yhweibabi@gmail.com.
3 Department of Neurology, Juntendo University Graduate School of Medicine, Bunkyo, Japan. Electronic address: masashi_tanaka@me.com.