1 Rheumatic Disease Center, Sasebo Chuo Hospital, Sasebo, Japan.
2 Department of Respiratory Medicine, Sasebo Chuo Hospital, Sasebo, Japan.
3 Department of Immunology and Rheumatology, Division of Advanced Preventive Medical Sciences, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan.
4 Department of Infectious Diseases, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan.
5 Department of Virology, Institute of Tropical Medicine, Dejima Infectious Disease Research Alliance, Nagasaki University, Nagasaki, Japan.