Farooq, Ambreen, et al. “DIAGNOSTIC ACCURACY OF ULTRASOUND IN ACUTE APPENDICITIS IN COMPARISON WITH ALVARADO SCORE KEEPING HISTOPATHOLOGICAL CORRELATION AS GOLD STANDARD”. Pakistan Armed Forces Medical Journal, vol. 70, no. 3, June 2020, pp. 807-11, https://pafmj.org/PAFMJ/article/view/4665.