This paper was highlighted in the comments of Tuller's latest blog, http://www.virology.ws/2017/12/23/trial-by-error-bristols-complaint-to-berkeley/, as a discussion of the issues surrounding the medical field's refusal to concede that they might, actually, be wrong, ever. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1550184/pdf/bmjcred00586-0019.pdf
Just leave this here in case it is of interest to anyone who is on Twitter. I don't have a Twitter account, haven't read the article either. Edit: Thanks @Mike Dean. https://twitter.com/user/status/1316729502463074309 Code: https://twitter.com/Dan_Wyke/status/1316729502463074309
The BMJ article referred to can be found here : https://www.bmj.com/content/bmj/287/6409/1919.full.pdf
Saw that on Twitter and couldn't get my head round it. Turns out the quote is not by Popper & McIntyre. It's by the authors of the chapter on food intolerance in Byron Hyde's Clinical & scientific basis of ME.