Upadhya, I.B., Patel, D.C. and Rao, K.R. 2020. Hoarseness of voice-prospective study: etiology, evaluation and treatment. International Journal of Otorhinolaryngology and Head and Neck Surgery. 6, 4 (Mar. 2020), 740–746. DOI:https://doi.org/10.18203/issn.2454-5929.ijohns20201292.