Mohammed Saeed Abd Ali and Osama Awaad Ali 2023. Vitamin D deficiency contributes to development of nasal polyps in Iraqi patients suffering from chronic rhinosinusitis. Journal of Population Therapeutics and Clinical Pharmacology. 30, 8 (Apr. 2023), 349–356. DOI:https://doi.org/10.47750/jptcp.2023.30.08.038.