1. Rabies Section MSG33, Viral and Rickettsial Zoonosis Branch, Division of Viral and Rickettsial Diseases, Centers for Disease Control and Prevention, U.S. Department of Health and Human Services, Atlanta, Georgia 30333, USA
2. Instituto de Salud Pública de Chile, Marathon 1000, Ñuñoa, Casilla 48, Santiago, Chile
3. Ministerio de Salud de Chile, Estado N°360, Oficina 602, Santiago, Chile