Perfusion Index to Assess Hemodynamic Changes and Analgesia with Premedication of Fentanyl versus Nalbuphineduring General Anesthesia - Kumkum Gupta; Bhawana Rastogi; Prashant K Gupta; Manoranjan K Bansal; Pavitra Kalra; Sukhreet Kaur (Academia Anesthesiologica International, 2019)