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https://www.webmd.com/covid/news/20220914/hyperbaric-oxygen-treatment-helps-long-covid-patients-study-says

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https://www.patientcareonline.com/view/long-covid-hyperbaric-oxygen-therapy-offers-hope-for-understanding-and-treating-symptoms

https://www.nature.com/articles/s41598-022-15565-0

https://bmjopen.bmj.com/content/12/11/e061870