Tafur Calderón, Luis Alberto. “Severity of Acute Respiratory Infection in Children under 5 Years of Age. Conditioning Factors in Cali”. Colombia Medica 21, no. 4 (December 31, 1990): 144–148. Accessed August 24, 2024. https://colombiamedica.univalle.edu.co/index.php/comedica/article/view/6319.