1. Medical Department, Faculty of Medicine, University of Toyama, Toyama 930‑0194, Japan
2. Department of Diagnostic Pathology, Field of Medical, Academic Assembly, University of Toyama, Toyama 930‑0194, Japan
3. Division of Medical Zoology, Department of Infection and Immunity, Jichi Medical University, Shimotsuke, Tochigi 329‑0498, Japan