1. Department of Respiratory Medicine, University of Occupational and Environmental Health, Japan, Kitakyushu, Fukuoka, Japan
2. Department of Clinical Nursing, University of Occupational and Environmental Health, Kitakyushu, Fukuoka, Japan
3. Department of Medicine, Kitakyushu Yahata-Higashi Hospital, Kitakyushu, Fukuoka, Japan
4. Department of Human, Information and Sciences, University of Occupational and Environmental Health, Japan, Kitakyushu, Fukuoka, Japan