Firstly, I am not at all qualified medically or scientifically, so this is purely my own uneducated thoughts. I would guess that if there really is a genetic predisposition to having ME/CFS, then there might be a good chance this study might identify it. If there isn't then of course there would be nothing to find. What I don't know is if it doesn't show anything, what the chances of a false negative might be - might there still be an undetected genetic predisposition even if the study did not show it. Is that something you might be able to find out @Andy - doesn't feel right for me to be bugging Chris Ponting about it at this time.