1. Department of Oral and Maxillofacial Surgery, Faculty of Medicine, Saitama Medical University, Iruma, Saitama 350‑0495, Japan
2. Department of Allergy and Immunology, Faculty of Medicine, Saitama Medical University, Iruma, Saitama 350‑0495, Japan
3. Division of Periodontology, Department of Cardiology and Periodontology, Kyushu Dental University, Kitakyusyu, Fukuoka 803‑8530, Japan