1. Vegetal Virology and Systematic Botany Laboratories, Institute of Agricultural Botany, Agronomy Faculty, Central University of Venezuela (UCV), ZIP 4579, Maracay 2101-A, Venezuela
2. Biotechnology and Plant Virology Laboratory, Center for Microbiology and Cell Biology, Venezuelan Institute for Scientific Research (IVIC), ZIP 20632, Caracas 1020-A, Venezuela
3. Biological Sciences Department, Lisandro Alvarado University (UCLA), ZIP 400, Barquisimeto, Venezuela.