V. Sánchez Ordóñez, G. P. González Pazmiño, and E. P. Astudillo Neira, “Prevalence of complicated pneumonia in hospitalized pediatric patients at José Carrasco Arteaga Hospital, January 2014 to December 2017: Original Research”, REV-SEP, vol. 21, no. 3, pp. Artículo 22:1-8, Dec. 2020.