Dr. Manoj Kantilal Parikh (2015) “A PROSPECTIVE STUDY TO ASSESS THE EFFECTIVENESS OF PRE-EMPTIVE ANALGESIA USING TRAMADOL VERSUS FENTANYL ON POST-OPERATIVE PAIN MANAGEMENT IN ORTHOPEDIC SURGERY PATIENTS”, Journal of Population Therapeutics and Clinical Pharmacology, 22(3), pp. 330–343. doi:10.53555/78rxx503.