Shekhar, R., and V. K. Gupta. “Evaluation of Alvarado Scoring System (MANTRELS Scoring) As a Diagnostic Aid in Preoperative Diagnosis of Acute Appendicitis at Nalanda Medical College and Hospital, Patna”. International Surgery Journal, vol. 7, no. 7, June 2020, pp. 2181-4, doi:10.18203/2349-2902.isj20202817.