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They are. Not all science is good, nothing is stopping people publishing garbage research in a garbage journal. Or slipping garbage research into a poor journal because it's topical and will generate interest. Nope. This is actually garbage. They used 7 people - seven. They took many samples from each person and the way they wrote the paper makes it so any cursory read or skim would lead you to believe that they had a decent sample size. But even for a pilot study, their strategy of comparing very sick hospitalized people with completely healthy people is very poor. You have a case of Dunning-Kruger. If there's anybody to criticize here, it's the reporting of these results like they were significant, which is something I doubt the researchers would agree with.

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