1. Department of Medicine and Biosystemic Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
2. Department of Respiratory Medicine, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
3. Department of Internal Medicine, Kyushu University Beppu Hospital, Beppu, Japan
4. Department of Medical Education, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan