1. National Center for Biotechnology Information, National Library of Medicine, National Institutes of Health, Bethesda, Maryland, USA
2. Archaeal Virology Unit, Institut Pasteur, Paris, France
3. Institute of Poliomyelitis, M. P. Chumakov Center for Research and Development of Immunobiological Products, Russian Academy of Sciences, Moscow, Russia
4. A.N. Belozersky Institute of Physical-Chemical Biology, M. V. Lomonosov Moscow State University, Moscow, Russia