1. Department of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama 700-8558, Japan
2. Department of Fungal Infection, National Institute of Infectious Diseases, Tokyo 162-8340, Japan
3. Omura Satoshi Memorial Institute, Kitasato University, Tokyo 108-8641, Japan
4. Department of Pathology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama 700-8558, Japan