1. Department of Pediatrics, Akita University Graduate School of Medicine
2. Department of Pediatrics, Nantan General Hospital
3. Department of Pediatrics, Yuri-Kumiai General Hospital
4. Department of Virology II, National Institute of Infectious Diseases
5. Center for Bioinformatics and Molecular Medicine, Graduate School of Biomedical Sciences, Nagasaki University
6. Department of Hygiene and Molecular Epidemiology, Graduate School of Biomedical Sciences, Nagasaki University