1. Department of Respiratory MedicineUniversity of Occupational and Environmental Health Kitakyushu Fukuoka Japan
2. Department of MicrobiologyUniversity of Occupational and Environmental Health Kitakyushu Fukuoka Japan
3. Department of Dentistry and Oral SurgeryUniversity of Occupational and Environmental Health Kitakyushu Fukuoka Japan
4. Department of Environmental EpidemiologyInstitute of Industrial Ecological SciencesUniversity of Occupational and Environmental Health Kitakyushu Fukuoka Japan
5. Department of Respiratory MedicineUnit of Translational MedicineNagasaki University Graduate School of Biomedical Sciences Nagasaki Japan