1. Biosecurity Laboratory (LSE), Animal Health National Service (SENASA), Heredia, Costa Rica
2. Universidad Técnica Nacional (UTN), Atenas, Costa Rica
3. Foreign Animal Disease Research Unit, Agricultural Research Service, U.S. Department of Agriculture, Plum Island Animal Disease Center (PIADC), Plum Island, New York, USA
4. Laboratory of Virology, Tropical Diseases Research Program (PIET), School of Veterinary Medicine, Universidad Nacional, Heredia, Costa Rica