Eroglu, Cemal, Faruk Demir, Duygu Erge, Pinar Uysal, Sevin Kirdar, Mustafa Yilmaz, and Imran Kurt Omurlu. 2019. “The Relation Between Serum Vitamin D Levels, Viral Infections and Severity of Attacks in Children With Recurrent Wheezing”. Allergologia Et Immunopathologia 47 (6): 591-97. https://all-imm.com/index.php/aei/article/view/274.