Karami, M.Y., Dehghanpisheh, L., Azemati, S. and Feiz, F. 2021. Pre-emptive intravenous paracetamol vs. ketorolac for shoulder pain in cesarean section under spinal anesthesia: A randomized double-blind placebo-controlled trial. Anaesthesia, Pain & Intensive Care. 25, 3 (Sep. 2021), 359–366. DOI:https://doi.org/10.35975/apic.v25i3.1425.