S. Kholoussi, N. Kholoussi, H. El Nady, E. A. Ashaat, R. F. M. Abdelkawy, and A. M. Abo-Shanab, “Immunological Markers in Children with Genetic Disorders and Recurrent Respiratory Tract Infections”, Open Access Maced J Med Sci, vol. 8, no. B, pp. 104–108, Feb. 2020.