I just did a search and came across this meta-analysis, which confirms your statement: http://jama.jamanetwork.com/article.aspx?articleid=185157 http://jama.ja

I just did a search and came across this meta-analysis, which confirms your statement: http://jama.jamanetwork.com/article.aspx?articleid=185157 http://jama.jamanetwork.com/article.aspx?articleid=185157