Santofimio Sierra, D., Osorio Pinzón, J., Salinas Cortés, D. F., Barreto, J., Ramos, J. A., Álvarez Perdomo, L. C. and Gómez A., C. (2014) “Anti-retroviral (ARV) drug resistance in patients with second therapeutic failure in an HIV program, Colombia”, RFS Revista Facultad de Salud, 6(1), pp. 34–39. doi: 10.25054/rfs.v6i1.151.