1. Department of Otolaryngology, Head and Neck SurgeryKyorin University School of MedicineTokyo Japan
2. Departments of Pharmacology and ToxicologyKyorin University School of MedicineTokyo Japan
3. Department of Head and Neck Surgery and OtolaryngologySaitama Medical University International Medical CenterHidaka Saitama Japan
4. Department of Partial Denture ProsthodonticsNihon University School of Dentistry, KandaChiyoda‐ku Tokyo Japan
5. Department of PathologyNihon University School of Dentistry, Tokyo, Japan, KandaChiyoda‐ku Tokyo Japan