Imani, Adel, et al. “Evaluation of the Association Between Serum Levels of Vitamin D and Benign Paroxysmal Positional Vertigo (BPPV): A Case-Control Study ”. Journal of Otorhinolaryngology and Facial Plastic Surgery, vol. 8, no. 1, Aug. 2022, pp. 1-6, doi:10.22037/orlfps.v8i1.39215.