This is an example of the kind of article I would like to write.

http://www.bhare.org/Geier2.pdf

I don't think this was ever done before based on data from the internet, so we would have to prove the credibility of the data. (some physicians still think that patients participating in internet support groups are unreliable and or cyberchondriacs and one of those could be a reviewer of the article).

I am also not sure how to go about this legally. If it was a case series of my own patients I would ask for the approval of the IRB of my hospital. In this case I believe we would have to create some consent form which each of us will sign separately.