1 Diagnostics and Therapeutics of Intractable Diseases, Intractable Disease Research Center, Graduate School of Medicine, Juntendo University, Bunkyo-ku, Tokyo 113-8421, Japan.
2 Department of Paediatrics, Graduate School of Medicine, Hokkaido University, Kita-Ku, Sapporo 060-8638, Japan.
3 Department of Paediatrics, Asahikawa City Hospital, Asahikawa, Sapporo 078-8510, Japan.
4 Department of Metabolism, Chiba Children's Hospital, Midori-ku, Chiba 266-0007, Japan.
5 Medical Genomics Center: National Center for Global Health and Medicine, Shinjuku City, Tokyo 162-8655, Japan.
6 Department of Paediatrics, Graduate School of Medicine, Hokkaido University, Kita-Ku, Sapporo 060-8648, Japan.
7 Department of Paediatrics and Clinical Genomics, Faculty of Medicine, Saitama Medical University, Moroyama, Saitama 350-0495, Japan.
8 Center for Intractable Diseases, Saitama Medical University Hospital, Moroyama, Saitama 350-0495, Japan.
9 Laboratory for Comprehensive Genomic Analysis, RIKEN Center for Integrative Medical Sciences, Yokohama, Kanagawa 230-0045, Japan.