Hembrom, R., S. Ghosh, S. Paul, R. Maiti, S. Mandal, S. Das, and B. Tamang. “Role of Vitamin D3 Supplementation in Allergic Rhinitis: An Outpatient Department Based Prospective Analytical Observational Study”. International Journal of Basic & Clinical Pharmacology, vol. 8, no. 11, Oct. 2019, pp. 2498-01, doi:10.18203/2319-2003.ijbcp20194791.