1. Federal Research Centre of Epidemiology and Microbiology named after Honorary Academician N. F. Gamaleya, Ministry of Health, Moscow, Russia
2. 48 Central Research Institute, Ministry of Defense, Sergiev Posad-6, Russia
3. No. 7 Main Military Clinical Hospital named after academician N. N. Burdenko, Ministry of Defense, Posad-7, Russia
4. Military Medical Academy named after S. M. Kirov, Ministry of Defense, Saint Petersburg, Russia