Saeed, M. H. ., and K. O. . Zangana. “Influence of Vitamin D and IgE Levels on Recurrent Wheezy Chest in Children under Two Years of Age; A Hospital-Based Case-Control Study”. AMJ (Advanced Medical Journal) , vol. 4, no. 2, Apr. 2023, pp. 104-8, doi:10.56056/amj.2018.69.