D. K. Pipal, S. Kothari, H. Shrivastava, A. Soni, and V. Pipal, “To evaluate the diagnostic accuracy of alvarado score, C-reactive protein, ultrasonography and computed tomography in acute appendicitis and to correlate them with operative and histological findings”, Int Surg J, vol. 4, no. 1, pp. 361–367, Dec. 2016.