Wasuwanich, Paul, Supharerk Thawillarp, Thammasin Ingviya, and Wikrom Karnsakul. 2020. “Coronavirus Disease 2019 (COVID-19) and Its Gastrointestinal and Hepatic Manifestations”. Siriraj Medical Journal 72 (4):272-82. https://doi.org/10.33192/Smj.2020.37.