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: As the coronavirus pandemic public health emergency begins to ebb in the United States, policymakers and providers need to evaluate how the addiction treatment system functioned during the public health emergency and draw lessons for future emergencies. One important question is whether the pandemic curtailed the use of addiction treatment and the extent to which telehealth was able to mitigate access barriers. Methods: To begin to answer this question, we conducted a survey of specialty addiction treatment providers in California from June 2020 through July 2020. The survey focused specifically on provider organizations that served Medicaid beneficiaries. Results: Of the 133 respondents, 50% reported a decrease in patients since the stay-at-home order in March 2020, with the largest decline among new patients, and 58% said more patients were relapsing. Eighty-one percent of providers said that telemedicine use had increased since the stay-at-home order. Most said that telemedicine had moderately (48%) or completely (30%) addressed access barriers. Conclusion: More efforts are needed to ensure that patients, and in particular new patients, receive addiction treatment during public health emergencies.
["Prevention"]