Hi, I just got back from NYC for a spinal tap with Dr. Natelson. He is doing a study on brain dysfunction and Cerebrospinal Fluid (CSF) protein abnormalities. I will say that the spinal tap is not the most enjoyable experience, but I really felt obligated to participate after seeing the results of his last CSF study. It shows very prominent differences in Spinal Fluid protein levels of CFS patients and healthy controls. This is a very possible cause for neurological dysfunction..... If you are interested please see the second link. Previous CSF study: http://www.ncbi.nlm.nih.gov/pubmed/21383843 Current Study Link: http://www.painandfatigue.com/new_research_studies.html Feel free to ask me any ?s. You get 150$ for doing it.