De Belder, Lize, Anne Malfroot, Yvan Vandenplas, Inge Gies, and Elke De Wachter. “Prophylactic Azithromycin in Pre-Schoolers With Chronic Respiratory Symptoms: A Longitudinal Survey”. Belgian Journal of Paediatrics 24, no. 3 (December 12, 2022). Accessed April 17, 2026. https://mail.belgjpaediatrics.com/index.php/bjp/article/view/30.