Saad, Khaled. “RECURRENT/PERSISTENT/PNEUMONIA/AMONG/CHILDREN/IN/UPPER/EGYPT”. Mediterranean Journal of Hematology and Infectious Diseases 5, no. 1 (April 18, 2013): e2013028. Accessed April 29, 2024. https://www.mjhid.org/mjhid/article/view/2013.028.