Reduction in Hemodynamic Changes during Direct Laryngoscopy and Intubation by Intravenous Clonidine or Nalbuphine Premedication - A Comparative Evaluation - Manoranjan Kumar Bansal; Kumkum Gupta; Abhishake Kumar; Salony Agarwal; Deepak Sharma; Ans M Baseer (Academia Anesthesiologica International, 2019)