I'd like to be able to read the sentence at the bottom of the left-hand column of the second page that starts: "Medical authorities now agree that...".
Unless it finishes with "...there is disagreement over the cause of ME/CFS" or similar, I'm thinking the statement must be a bit of a lie.
I think we can see what this article (and possibly the book) is worth from the statement; "one of the most robust scientific findings regarding chronic fatigue is that when patients are convinced that their condition is biological and untreatable, and fear that engaging in activity will be harmful, they are much less likely to recover."
The speaker and the scientists who came up with the "robust" findings were clearly a little confused. Let me rephrase things for them:
"One of the most robust scientific findings regarding chronic fatigue is that when patients, in spite of their best efforts to keep going and get well, find they have been ill for a very long time and not recovered, they often come to the not unreasonable conclusion that the condition is untreatable".
If inanities like this are typical of Marchant's general level of intellect, we could take sweets off her all day.