You are presented with a paragraph from a COVID-19 literature. Classify the topics of this piece of text by choosing from the following categories:

- Epidemic Forecasting: The content relates to predictions about the spread of COVID-19.
- Treatment: The paragraph discusses therapeutic methods or medication for COVID-19.
- Prevention: The content covers measures to prevent the spread of COVID-19.
- Mechanism: The paragraph explains the biological mechanisms of the virus.
- Case Report: The content is a report of a COVID-19 case.
- Transmission: The paragraph discusses how COVID-19 is transmitted.
- Diagnosis: The content is about diagnosing COVID-19 in individuals.

Your classification should be provided as an element within a JSON array. The array should be formatted with topics enclosed in double quotes and separated by commas, following the JSON format, for example: ["Topic1", "Topic2", ...]. Include all applicable topics within the array. Your output should be a valid JSON array, and no additional text should be included in your response.

Article:

BACKGROUND: Coronavirus disease 2019 (COVID-19) virus has affected all the systems of the body, defying all impressions of it being a respiratory virus only. AIM: To see the association of mesenteric ischemia with COVID-19. METHODS: After initial screening and filtering of the titles on PubMed and Google Scholar, 124 articles were selected. Articles were read in full, and the references were skimmed for relevance. Twenty-six articles (case reports and case series) were found to eligible for inclusion. References of these 26 articles were checked for any additional cases. Two more publications were found, and a total of 28 articles (22 case reports and 6 case series) have been included for review in this manuscript. RESULTS: A total of 41 cases of acute mesenteric ischemia in COVID-19 patients have been reported in the literature since the outbreak of this pandemic. Most of them include patients with comorbidities. CONCLUSION: In conclusion, based on this literature review and precise published knowledge regarding acute mesenteric ischemia in patients with COVID-19, it is essential to understand its relevance in all patients with gastrointestinal symptoms. The threshold for the diagnostic investigations should also be kept low for the timely diagnosis and management of this disorder.
["Diagnosis"]