M. Rajabi, D. Ommi, A. Zali, and N. M. Arefian, “Effects of Dexmedetomidine On the Postoperative Shivering, Nausea, and Vomiting Among Opium User Patients Undergoing Elective Supratentorial Brain Tumor Surgery: A Randomized, Placebo, Controlled Clinical trials: ”, Galen Med J, vol. 10, p. e2146, Aug. 2021.