1. Department of Oral and Maxillofacial Surgery National Hospital Organization Kyoto Medical Center Kyoto Japan
2. Department of Otolaryngology‐Head and Neck Surgery Otsu Red Cross Hospital Otsu Shiga Japan
3. Division of Clinical Research Planning and Management, Clinical Research Institute National Hospital Organization Kyoto Medical Center Kyoto Japan
4. Department of Pharmacy National Hospital Organization Kyoto Medical Center Kyoto Japan
5. Division of Preventive Medicine Clinical Research Institute National Hospital Organization Kyoto Medical Center Kyoto Japan