Reyes Ortiz, C. A., V. E. Espitia, L. F. Vélez, and R. Espinoza. “ 1993-1997”. Colombia Medica, vol. 29, no. 4, Oct. 1998, pp. 129-33, https://colombiamedica.univalle.edu.co/index.php/comedica/article/view/104.