?url_ver=Z39.88-2004&rft_id=10.1027%2F0269-8803.20.3.212&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=Pietro&rft.aulast=Pietrini&rft.au=Pietrini%2C+Pietro&rft.issn=0269-8803&rft.atitle=Neuronal+correlates+of+cholinergic+enhancement+on+cognitive+function%3A+In+vivo+PET+and+fMRI+studies+in+humans&rft.title=Journal+of+Psychophysiology&rft.date=2006&rft.volume=20&rft.issue=3&rft.pages=214&rft.genre=article