Ramesh Babu, G., Kumar, G. R., & Krishna Chaitanya, V. (2018). Correlation of anatomical variations in chronic sinusitis with diagnostic nasal endoscopy and CT scan of paranasal sinuses: an observational study. International Journal of Otorhinolaryngology and Head and Neck Surgery, 5(1), 41–44. https://doi.org/10.18203/issn.2454-5929.ijohns20184723