S. Natalia, F. I. Thorion, L. Adlino, C. E. John, A. Kurniawan, and N. P. H. Lugito, “The clinical features of COVID-19 patients with positive viral RNA stool test results and possibility of fecal-oral transmission : A Systematic Review”, InaJGHE, vol. 22, no. 1, pp. 42–51, May 2021.