1. Department of Respiratory Medicine, Tokyo Medical University, Tokyo, Japan
2. Department of Respiratory Medicine and Infectious Diseases, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
3. Department of Laboratory Medicine, Niigata University School of Medicine, Niigata, Japan
4. Department of Neurology and Geriatrics, Gifu University Graduate School of Medicine, Gifu, Japan