@article{chandrakar_alexander_r._rajendiran_ramasamy_2020,  title={25-Hydroxyl Vitamin D Deficiency in Nasal Polyposis},  volume={24},  ISSN={1809-4864},  url={https://doi.org/10.1055/s-0039-3399541},  DOI={10.1055/s-0039-3399541},  number={3},  journal={International Archives of Otorhinolaryngology},  publisher={Fundação Otorrinolaringologia},  author={Chandrakar, Ankur Kumar and Alexander, Arun and R., Medha and Rajendiran, Kalaiselvi and Ramasamy, Karthikeyan},  year={2020},  month={Jul},  pages={308–312} }