Using Wikis in Hospitals?

An anonymous reader asks: "A friend who is a medical doctor in a hospital in Europe is interested in promoting wikis for sharing medical research notes in his community. Does anyone have experience with how to approach this? Most of the targeted users will not be particularly computer, or Internet, literate. I've used wikis in several software companies but never in a medical environment. What would be the best way to overcome resistance? How should my friend present it so that it makes sense to them?"