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: In Germany, the COVID-19 pandemic has significantly changed cardiological care in both the outpatient and inpatient setting, including the cancellation of elective interventions. The investigation presented here was carried out in order to obtain information on the extent to which this also applies to cardiac rehabilitation facilities. METHODS: In August 2020, all 107 member institutions of the DGPR were contacted and asked to take part in an online survey containing 12 sets of questions on the topic. RESULTS: At end of August, data were available from 45 institutions. 31.1 % of the institutions surveyed rehabilitated patients with cardiac complications/manifestations of COVID-19 disease, mainly after acute coronary syndrome (29.6 %) and pulmonary artery embolism (25.9 %). More than 40 % of the facilities were required to close down partially or completely, and 14 % feared a partial or complete closure by the end of 2020. The costs for testing, if SARS-CoV-2 infection was suspected (72.1 %), were mainly borne by the rehabilitation facilities. CONCLUSIONS: Despite the limitations of a short-term data collection and a response rate of approx. 45 %, the present study gives indications of the challenging situation of the COVID-19 pandemic for cardiological rehabilitation facilities in Germany.
["Prevention"]