[cormacrelf]

If you were trying to turn your scientific community around and make them pay attention to an issue when they hadn't been, isn't "Guys this thing is real" the tone you would take? The lit review is used to show that not enough research $ are being poured to get good science, but you can't convince the $ to flow if people don't think it exists. You don't have to prove the disorder exists to a peer-reviewed standard before they let you try to do exactly that. You can start with anecdotes if you want. These folks started with a meta-analysis of risk factors, which looks fine to me.