Khin Phyu Pyar (2022) “COVID-19 and Gastrointestinal Manifestation: A Case Report on Colonic Perforation in 91-year- old man with Severe COVID-19 Infection ”, Issues and Developments in Medicine and Medical Research Vol. 7, pp. 165–174. doi: 10.9734/bpi/idmmr/v7/3421E.