Sameh Ghareeb Ahmed, et al. “Pain Management of Pecto-Intercostal Fascial Block Versus Intravenous Fentanyl After Pediatric Cardiac Surgery”. Journal of Population Therapeutics and Clinical Pharmacology, vol. 30, no. 11, May 2023, pp. 26-35, https://doi.org/10.47750/jptcp.2023.30.11.004.