1. Department of Gastroenterology and Hepatology; Kyoto University Graduate School of Medicine; Kyoto Japan
2. Department of Health Promotion and Human Behavior; Kyoto University Graduate School of Medicine/School of Public Health; Kyoto Japan
3. Department of Respiratory Medicine; Graduate School of Medicine,Osaka City University; Osaka Japan
4. Department of Respiratory Medicine, Allergy and Clinical Immunology; Graduate School of Medical Sciences, Nagoya City University; Nagoya Japan
5. Department of Health Promotion and Human Behavior; Kyoto University School of Public Health; Kyoto Japan