I ran across this article. It's actually good information (for a change!) and the links to other aggression articles are, with the exception of the author's misinformation about the San Francisco dog attack (it was a Presa X, bred and conditioned to attack), good also.
http://www.petplace.com/Articles/artShow.asp?artID=2595
http://www.petplace.com/Articles/artShow.asp?artID=2595