I am very surprised that a Dutch CBT/GET proponent will do a presentation at this symposium.
He is part of the group of fatigue researchers who are still promoting CBT and CBT/ GET as a cure for CFS and for QFS although their research showed a null result.
Yes, the Ruud Raijmakers talk on Q-fever fatigue syndrome didn't disappoint. He is actually a good clear speaker. So we could see his unfortunate reasoning about the efficacy of CBT very clearly. I took a screen shot of the slide showing how CBT works in Q-fever fatigue syndrome.
After telling us that CBT is a proven therapy for CFS, he told us about their investigation of CBT for
QFS. He is happy that CBT was a success (as measured at EOT). He does not know why the effect of CBT wears off so that, by followup, the CBT treated group has marginally worse fatigue than those with the placebo treatment. They are working hard to tweak the CBT so that it will last longer.
He mentioned that the impact of CBT in CFS (70% success rate

) seems to wear off after 2 years but that it wears off much more quickly in QFS patients. Sadly no one in the audience explained the transient impact of CBT on questionnaire answering to Ruud. Perhaps we should send him a copy of Graham's video.
He did go on to talk about some interesting biomedical results, so, all in all, I think it's a talk worth watching.
The questions at the end are worth a listen too. There was an Australian (a doctor?) who, when the question of whether CFS and QFS are the same came up noted that it's definitely a different disease. 'The people who get QFS are hardworking farmers, nothing like the sort of people who get classic CFS...'
Also in the question time was the mention of an Adelaide professor, Marmion?, now deceased. He seemed to have been well regarded. He apparently found evidence of the Q fever bacteria (perhaps whole bacteria, perhaps polysaccharide debris) in the bone marrow of QFS patients and hypothesised that this was the cause of the ongoing symptoms.