@
alex3619 Dr. Barry Marshall (an amazing
Australian doctor

) proved that the bacterium Helicobacter Pylori is the cause of most peptic ulcers, by infecting himself with H. Pylori and subsequently developing peptic ulcer.
For this important "discovery", or shall we say reversal of the medical doctrine, which previously supported stress, spicy foods and stomach hyperacidity as causes of ulcers, he was awarded the Nobel Prize in Physiology.
Makes you wish we had a similar scenario with ME, but I think the situation is a tiny bit more complicated ... ;(
As far as CPET's cost goes, here in the US, specifically in California the Workwell Foundation charges at least $ 2000, a sum of money that for most of us is out of reach.
I don't think that any insurance policy, at this time, covers or reimburses it and that is why we need to be advocating studies done by our ME/CFS doctors' clinics, funded by the CDC, but with the
2 Days CPET.