Comparison of the Efficacy of Intravenous Dexmedetomidine versus Intravenous Clonidine for Controlled Hypotension during Functional Endoscopic Sinus Surgery: A Prospective Observational Study. - Krishna S; Shetty D; Podder S; Vasa TN; Devalla A; Sinha S; Maria J; Mathew S (Annals of African medicine, 2025)