When did Wikipedia become a valid source of accurate information, Mrs. Librarian? Something must have changed since I've been in PA School with my head stuck in a book because I just found a "scholarly" article in a PEER-REVIEWED journal that sited Wikipedia. Seriously?!
I thought Wikipedia was for winning bets with friends about who invented the escalator and stuff like that, not for valid background information about Alzheimer's for your research paper...
Your librarian expertise would be appreciated,