Found a good non-paywall article, and this is what I was curious about
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https://www.newscientist.com/article...ajor-analysis/
Quote:
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However,#Johan Lundberg#at the Karolinska Institute in Sweden says a limitation of the analysis is that it didn’t distinguish between people who had ongoing depression and those who have episodes of depression, whose state at the time they were assessed could affect the functioning of their serotonin systems. “It is key to separately analyse data from studies that examine the same patients when ill and when in remission, to have optimal conditions to examine the hypothesis,” he says.
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