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> the press release called this a clinical trial, but it's not

Yes, it is.

Any intervention in humans that is meant to create generalizable information regarding a treatment intervention is a clinical trial.

The quality of the information is not as strong as a double-blind, placebo controlled, RCT, but it is still accurate to call it a clinical trial.

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By the tenor of your response, I assume you understood what I meant in this very-non-medical of forums, which means you understood why the paper's authors themselves chose not to call their study a trial (even though they registered it as a "clinical trial", as is necessary for any clinical study in humans involving a treatment intervention). Which leaves me wondering about the purpose of your response.

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