N. Loango, R. Vargas, J. H. Osorio, M. L. Gallego, and P. Landázuri, “Increased frequency of the D allele and the DD genotype of the angiotensin-converting enzyme in patients with a first coronary event”., Universitas Scientiarum, vol. 15, no. 1, pp. 77–84, Jan. 2010.