1. Department of Orthodontics, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1, Sakuragaoka, Kagoshima 890-8544, Japan
2. National Sanatorium Hoshizuka-Keiaien, 4204, Hoshizukacho, Kanoya, Kagoshima, Japan
3. Department of Respiratory Medicine, Kagoshima Kouseiren Hospital, Kagoshima, 22-25, Tenpozan, Kagoshima, Japan
4. Department of Digestive Disease and Life-style-related Disease, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1, Sakuragaoka, Kagoshima, Japan