Affiliation: | 1. Department of Internal Medicine and Clinical Immunology, Yokohama City University Graduate School of Medicine, , Yokohama, Japan;2. Department of Respiratory Medicine, Saiseikai Yokohamashi Nanbu Hospital, , Yokohama, Japan;3. Department of Respiratory Medicine, Fukujuji Hospital, , Tokyo, Japan;4. Respiratory Disease Center, Yokohama City University Medical Center, , Yokohama, Japan |