Chigicherla, Swathi, Shruti Tewari, Rahul Deo Sharma, and Rajesh Nathani. 2020. “Sub-Glottic Cysts Causing Upper Airway Obstruction”. International Journal of Otorhinolaryngology and Head and Neck Surgery 6 (6):1203-5. https://doi.org/10.18203/issn.2454-5929.ijohns20202227.