1. Rabies Group, Institute for Natural Foci Infections, Prospekt Mira, 7, Omsk, 644080 Russia
2. Rabies Section, Centers for Disease Control and Prevention, 1600 Clifton Rd., Atlanta, Georgia 30333, USA
3. Epidemiology Chair, State Medical University, Krasnogo Vosstania, 1, Irkutsk 664003, Russia
4. Rabies Research and Diagnostic Group, Veterinary Laboratories Agency, Weybridge, Addlestone, Surrey KT15 3NB, UK