?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=Marc+J.&rft.au=Mentis%2C+Marc+J.&rft.aulast=Mentis&rft.issn=0002-953X&rft.pages=785-794&rft.issue=6&rft.atitle=Increasing+required+neural+response+to+expose+abnormal+brain+function+in+mild+versus+moderate+or+severe+Alzheimer%E2%80%99s+disease%3A+PET+study+using+parametric+visual+stimulation&rft.date=June+1998&rft.title=American+Journal+of+Psychiatry&rft.volume=155&rft.genre=article