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I have just removed a couple of tags from the top of the article. Let me suggest, though, that it would be good to have a non-technical introductory paragraph at the top, so that readers who reach the article accidentally and don't have the knowledge to make sense of it can be directed to a place giving less technical information about serotonin. Looie496 (talk) 16:45, 27 September 2012 (UTC)