A review on cognitive behavorial therapy (CBT) and graded exercise therapy (GET) in myalgic encephalomyelitis (ME) / chronic fatigue syndrome (CFS): CBT/GET is not only ineffective and not evidence-based,but also potentially harmful for many patients with ME/CFS. Neuro Endocrinol Lett. 2009 Aug 26;30(3):284-299. [Epub ahead of print] Twisk FNM *, Maes M.