1. Department of Microbiology, Mount Sinai School of Medicine, New York, USA
2. Department of Biochemistry and Molecular Biology, the Faculty of Medicine, University of Salamanca, Spain
3. Center Molecular Biology and Genetics, Kyoto University, Japan
4. Department of Microbiology, Box 1124, Mount Sinai School of Medicine, 1 Gustave L. Levy Place, New York, NY 10029, USA