David, L.-E., T. Surdea-Blaga, and D.-L. Dumitrascu. “Semiquantitative Fecal Calprotectin Test in Postinfectious and Non-Postinfectious Irritable Bowel Syndrome: Cross-Sectional Study”. São Paulo Medical Journal, vol. 133, no. 4, July 2015, pp. 343-9, https://periodicosapm.emnuvens.com.br/spmj/article/view/1296.