1. Division of Otolaryngology‐Head and Neck SurgeryGraduate School of Medical Science, Kanazawa University Kanazawa Ishikawa Japan
2. Department of OtolaryngologyNational Hospital Organization Kanazawa Medical Center Kanazawa Ishikawa Japan
3. Department of Molecular GeneticsGraduate School of Medical Science, Kanazawa University Kanazawa Ishikawa Japan
4. Department of Virology IINational Institute of Infectious Diseases Tokyo Japan