Rodríguez-Villamizar LA , Rojas-Roa NY, Blanco-Beceerra LC, Herrera-Galindo VM, Fernández-Niño JA. Short-term effects of air pollution on respiratory and cerebro-cardiovascular morbidity in Colombia 2011-2014: a multi-city time series analysis. International Journal of Environmental Research and Public Health. 2018:15:1610. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6121387/. Doi: 10.3390/ijerph15081610.