1. Department of Infectious Diseases; St. George's Hospital Medical School, Cranmer Terrace; London SW17 0RE United Kingdom
2. National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency, Thailand Science Park; 111 Paholyothin Rd. Pathumthani 12120 Thailand
3. Department of Microbiology and Immunology; Albert Einstein College of Medicine; Forchheimer 403, 1300 Morris Park Ave. The Bronx NY 10461