Pillai, N. Gopinathan, and Induvarsha Gopinath. 2019. “A Prospective Analysis of Vitamin D and Recurrent Benign Paroxysmal Positional Vertigo”. International Journal of Otorhinolaryngology and Head and Neck Surgery 5 (6):1548-51. https://doi.org/10.18203/issn.2454-5929.ijohns20194924.