Nashibi, Masoud, et al. “Evaluation of the Effect of Oral Clonidine Premedication on PR- Interval, in Rhinoplasty and Functional Endoscopic Sinus Surgery”. Journal of Otorhinolaryngology and Facial Plastic Surgery, vol. 10, no. 1, Dec. 2024, pp. 1-8, doi:10.22037/orlfps.v10i1.47583.