W. S. Ahmed, S. M. Tajer, and H. M. Sayaly, “Predictive Value of Alvarado Score and Ultrasound in the Diagnosis of Acute Appendicitis (A prospective study”, JFacMedBagdad, vol. 62, no. 4, pp. 99–103, Feb. 2021, doi: 10.32007/jfacmedbagdad.6241807.