I don't know if it's been posted elsewhere on this site but Japenese researchers are claiming they found a chemical which is suppressed by dopamine that is abnormally high in CFS patients. I believe they said like 50 times higher in CFS patients. They have not been published yet. I'm surprised this is not getting more press. Hopefully it leads to something positive for us. A diagnostic marker would be nice. Not sure how to do links on here yet but I saw it posted on the pro health board.