1. Department of Infectious Diseases; Kitano Hospital; The Tazuke Kofukai Medical Research Institute; Osaka Japan
2. Center for Diabetes and Endocrinology; Kitano Hospital; The Tazuke Kofukai Medical Research Institute; Osaka Japan
3. Department of Laboratory Medicine; Kitano Hospital; The Tazuke Kofukai Medical Research Institute; Osaka Japan
4. Department of Pharmacy; Kitano Hospital; The Tazuke Kofukai Medical Research Institute; Osaka Japan
5. Laboratory of Virology and Vaccinology; Division of Biomedical Research; National Institute of Biomedical Innovation; Ibaraki Japan
6. Division of Clinical Virology; Department of Microbiology and Infectious Diseases; Kobe University Graduate School of Medicine; Kobe Japan
7. Department of Hygiene and Public Health; Teikyo University School of Medicine; Tokyo Japan