Tüfekci, Sinan, and Erhan Aygün. “Association of Vitamın D Deficiency and Respiratory Syncytial Virus With Severe Lower Respiratory Tract Infection in Newborn Intensive Care Unit”. Archives of Clinical and Biomedical Research 4, no. 6 (November 20, 2020): 721–727. Accessed June 6, 2026. https://fortunejournals.org/ojs/index.php/acbr/article/view/14803.