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http://www.ncbi.nlm.nih.gov/entrez/...Retrieve&dopt=abstractplus&list_uids=16540862
http://www.ncbi.nlm.nih.gov/entrez/...uids=16930489&query_hl=12&itool=pubmed_docsum
Not the most methodologically sound studies in the world, but suggestive nonetheless.
http://www.ncbi.nlm.nih.gov/entrez/...uids=16930489&query_hl=12&itool=pubmed_docsum
Not the most methodologically sound studies in the world, but suggestive nonetheless.