1. Department of Immunology,
2. The Third Department of Internal Medicine, Faculty of Medicine, Kagoshima University, 8-35-1 Sakuragaoka, Kagoshima 890-8520, Japan.
3. Sir William Dunn School of Pathology, University of Oxford, Oxford OX1 3RE, UK.
4. Department of Genito-Urinary Medicine and Communicable Diseases, Imperial College London, St. Mary's Campus, Norfolk Place, London W2 1PG, UK.
5. Department of Infectious Disease and Immunology, Okinawa-Asia Research Center of Medical Science, Faculty of Medicine, University of the Ryukyus, Uehara-cho 207, Nishihara, Okinawa 903-0215, Japan.