1. Central American Institute for Studies on Toxic Substances (IRET); Program on Work, Environment and Health in Central America (SALTRA), Universidad Nacional; Heredia; Costa Rica
2. School of Engineering in Occupational Health and Environmental Hygiene; Instituto Tecnológico de Costa Rica; Heredia; Costa Rica
3. Umeå Centre for Global Health Research; Umeå University; Sweden
4. Mesoamerican Sustainable Development Center of the Dry Tropics (CEMEDE); Universidad Nacional; Nicoya; Costa Rica