Salman, A., Zayed, N., Mansour, A., Howaidi, R., Foly, A., ElSharkawy, M., & Abdelgalil, A. (2021). Role of pre–extubation fentanyl in mastectomy: a randomized, controlled, double–blind study. Anaesthesia, Pain & Intensive Care, 25(2), 143-149. https://doi.org/10.35975/apic.v25i2.1462