Kruger, F., C. Daniels, M. Kidd, G. Swart, K. Brundyn, C. van Rensburg, and M. Kotze. “APRI: A Simple Bedside Marker for Advanced Fibrosis That Can Avoid Liver Biopsy in Patients With NAFLD/NASH”. South African Medical Journal, vol. 101, no. 7, Sept. 2011, pp. 477-80, https://www.ajol.info/index.php/samj/article/view/69769.