D. J. Daghman, A. M. S. Ahmad, and N. A. Dayoub, “The outcomes of Gastrointestinal manifestations in Covid-19 infection on mortality, disease severity and hospitalization period. A mini-review”, JMPS, vol. 6, no. 5, pp. 39–51, Sep. 2022, doi: 10.26389/AJSRP.G060422.