L. Ecker, J. Ruiz, M. Vargas, L. J. Del Valle, and T. J. Ochoa, “Prevalence of purchase of antibiotics without prescription and antibiotic recommendation practices for children under five years of age in private pharmacies in peri-urban areas of Lima, Peru”, Rev Peru Med Exp Salud Publica, vol. 33, no. 2, pp. 215–223, May 2016, doi: 10.17843/rpmesp.2016.332.2152.