1. Environmental Leadership and Training Initiative, Yale University School of Forestry & Environmental Studies, New Haven, Connecticut, USA
2. Department of Innovation, Reforestamos México, A.C., Mexico City, Mexico
3. Pronatura Veracruz A.C., Programa Ecoforestal, Coatepec, Veracruz, Mexico
4. Universidad Veracruzana, Instituto de Biotecnología y Ecología Aplicada, Xalapa, Veracruz, Mexico