“Association of Vitamın D Deficiency and Respiratory Syncytial Virus with Severe Lower Respiratory Tract Infection in Newborn Intensive Care Unit”, acbr, vol. 4, no. 6, pp. 721–727, Nov. 2020, Accessed: Sep. 20, 2026. Available: https://www.fortunejournals.org/ojs/index.php/acbr/article/view/14803