1. Department of Pathobiological Science and Technology, Graduate School of Medical Sciences, School of Health Science, Tottori University Faculty of Medicine, Yonago 683-8503, Japan
2. Division of Respiratory medicine and Rheumatology, Graduate School of Medical Sciences, School of Medicine, Tottori University Faculty of Medicine, Yonago 683-8504, Japan
3. Department of Nursing, Graduate School of Health Sciences, Okayama University, Okayama 700-8558