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 Biostatistics and Epidemiology, Yokohama City University Medical Center, Yokohama, Japan;4.Respiratory Disease Center, Yokohama City University Medical Center, Yokohama, Japan |