Upadhyay, A.A. and Bhide, P.P. 2016. Vitamin D and calcium deficiency in otolaryngological diseases. International Journal of Otorhinolaryngology and Head and Neck Surgery. 2, 4 (Sep. 2016), 216–219. DOI:https://doi.org/10.18203/issn.2454-5929.ijohns20163468.