1. Department of Microbiology and Virology, Pirogov Russian National Research Medical University, Moscow 117997, Russia
2. Animal Science Department, Biomedical Primate Research Center, P.O. Box 3306, 2280 GH Rijswijk, The Netherlands
3. Skryabin Institute of Biochemistry and Physiology of Microorganisms, Russian Academy of Sciences, Pushchino 142290, Russia