Sathyanarayanan, C., B. Swaminathan, R. Shanmugam, V. U. Shanmugam, P. ., V. M. Lavanya, and P. S. Divya. “Asymptomatic Hearing Loss-a Missed Symptom of COVID-19”. International Journal of Otorhinolaryngology and Head and Neck Surgery, vol. 7, no. 10, Sept. 2021, pp. 1589-92, doi:10.18203/issn.2454-5929.ijohns20213691.