Abstract
1 Enterovirus Laboratory, Department of Viral Diseases and Immunology, National Public Health Institute (KTL), Mannerheimintie 166, FIN-00300 Helsinki, Finland
2 Department of Virology, University of Turku, Kiinamyllynkatu 13, FIN-20520 Turku, Finland
3 National Reference Centres, Public Health Office of the Slovak Republic, Trnavska 52, 82645 Bratislava, Slovak Republic
4 State Agency Public Health Agency, Virology Laboratory, Klijanu Str. 7, LV-1012 Riga, Latvia
5 M. P. Chumakov Institute of Poliomyelitis and Viral Encephalitides of Russian Academy of Medical Science, Kievskoe Shosse 27 km, 142782 Moscow Region, Russian Federation