The study was unique in that after the extensive work-up in visit 1, five outside ME/CFS expert clinicians reviewed each case to decide if the patient fit all the published criteria for ME/CFS. This was quality control, to ensure patients really had ME/CFS. Three patients of the initial group were found to have other diagnoses - one had Parkinsonism, one had a rare (and fatal cancer), and so they were excluded from the second phase of the study. 9/