1. University of Texas Medical Branch, Galveston, USA
2. University of South Florida, Tampa, USA
3. Instituto Mexicano del Seguro Social, Guadalajara, Mexico
4. Universidad de Guadalajara, Mexico
5. University of Texas, Edinburg, USA
6. University of Northern Arizona, Flagstaff, USA
7. Medical Entomology Research and Training Unit, Guatemala City, Guatemala
8. Drexel University, Philadelphia, PA, USA