1. Faculty of Science and Technology, Division of Molecular Science, Gunma University, Kiryu, Gunma 376‑8515, Japan
2. Department of Pathology, Gunma University Graduate School of Medicine, Maebashi, Gunma 371‑8511, Japan
3. Department of Otolaryngology‑Head and Neck Surgery, Gunma University Graduate School of Medicine, Maebashi, Gunma 371‑8511, Japan