1. Department of Oral and Maxillofacial Surgery, Shimane University Faculty of Medicine, Izumo, Shimane 693‑8501, Japan
2. Department of Medicine, Hematology Oncology, Indiana University School of Medicine and The Roudebush Veterans Administration, Indianapolis, IN 46202, USA
3. Department of Oral and Maxillofacial Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, 2‑5‑1 Shikata‑cho, Okayama, Okayama 700‑8525, Japan