Kuruvilla, A. V., and S. P. Vazhappilly. “A Study of the Hearing Status in the Contralateral Healthy Ear of Patients With Chronic Otitis Media Following Mastoidectomy Surgery in a Tertiary Care Hospital, Kerala, India”. International Journal of Otorhinolaryngology and Head and Neck Surgery, vol. 8, no. 3, Feb. 2022, pp. 174-9, doi:10.18203/issn.2454-5929.ijohns20220464.