Lianto, Lie Milka Ardena. “GASTROINTESTINAL SYMPTOMS ARE ASSOCIATED WITH SEVERITY OF CORONAVIRUS DISEASE 2019: A SYSTEMATIC REVIEW”. Journal of Advanced Research in Medical and Health Science (ISSN 2208-2425) 9, no. 6 (June 22, 2023): 49–53. Accessed June 13, 2025. https://jarmhs.com/index.php/mhs/article/view/197.