Sánchez, Jorge, Andrés Sánchez, and Ricardo Cardona. “Clinical Differences Between Children With Asthma and Rhinitis in Rural and Urban Areas”. Colombia Médica 49, no. 2 (June 29, 2018): 169-174. Accessed June 30, 2022. https://colombiamedica.univalle.edu.co/index.php/comedica/article/view/3902.