1. Department of Otorhinolaryngology, Japan Community Health Care Organization (JCHO) Sendai Hospital
2. Department of Otolaryngology-Head and Neck Surgery, Tohoku University Graduate School of Medicine
3. Department of Rheumatology, Tohoku University Hospital
4. Department of Nephrology, Japan Community Health Care Organization (JCHO) Sendai Hospital
5. Department of Gastroenterology, Japan Community Health Care Organization (JCHO) Sendai Hospital
6. Division of Pathology, Faculty of Medicine, Tohoku Medical and Pharmaceutical University