1. Department of Pathology, Shinshu University School of Medicine, Matsumoto, Nagano 390‑8621, Japan
2. Department of Respiratory Medicine, National Hospital Organization Matsumoto Medical Center, Matsumoto, Nagano 399‑8701, Japan
3. Department of Laboratory Medicine, National Hospital Organization Matsumoto Medical Center, Matsumoto, Nagano 399‑8701, Japan