Just want to clarify something. The researchers don't find something that is causing hair loss in mice. they find something that is abnormal in the human scalp, they inject it to mice, mice have hair loss, so they conclude that the that substance is what causes hair loss in humans, they find a ''medicine'' that ''fights'' the cause of hair loss identified : ''the substance''. once found, mice regain their hair. but once used on humans it doesn't necessarily works, either because its just a contributing factor, or it works differently on mice. but i don't see how they could do it differently.
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