There's thought to be a natural rate of recovery of around 5%, so there will be many people who recovered while co-incidentally doing all manner of things, CBT, GET, homeopathy, etc. There's no good evidence that CBT or GET help people recover. Even relying on just subjective self-report questionnaires prone to problems with bias, the PACE trial's prespecified recovery criteria showed that there was no significant improvement in recovery rates when CBT and GET were added to patients' medical care: https://www.tandfonline.com/doi/abs/10.1080/21641846.2017.12...