School of Public Health, University of Alberta.
Department of Computing Science, University of Alberta.
Department of Analytical Chemistry, University of Alberta.
Department of Earth and Atmospheric Sciences, University of Alberta.
Department of Environmental and Occupational Health Rutgers School of Public Health.
Environmental Health Sciences, University of Michigan, School of Public Health.
Universidad Nacional Autónoma de México, México
Centro de Investigación y Estudios Avanzados del IPN, México
Instituto Nacional de Cancerología, México
Instituto Nacional de Enfermedades Respiratorias, México
Universidad Industrial de Santander, Colombia