c) In clinical practice CBT/GET has proven to be counterproductive
Moreover, if one considers objective measures of the effects of CBT/GET in clinical practice, the situation is even worse: CBT/GET has proven to be counterproductive. For example, the evaluation of the CBT/GET therapy offered by the Belgium CFS Reference Centers in the period 2002–2004 (Council of approval with regards to rehabilitation contracts with CFS reference centres for patients suffering from Chronic Fatigue Syndrome, 2006) established that the exercise capacity (VO2max, aerobic threshold, etc) had not improved and that the occupational participation had even decreased after the “rehabilitation therapy” with CBT/GET. According to the Belgian Minister of Health CBT/GET are not to be considered curative therapies (Official minutes of Assembly of the Commission of Health, Environment and Social Innovation, Belgian House of Representatives, 24th October 2007. 5th session, 51th term). Thus, the Belgian Ministry of Social Affairs and Health, who carried out this evaluation, has provided evidence that CBT/GET has no significant efficacy in the treatment of ME/CFS (Maes & Twisk, 2009). Based upon evidence-based criteria and clinical experiences the claim that CBT/GET is the only effective treatment cannot be substantiated.