Here's something a little different: the author of the Canadian Consensus Criteria explains some of the thinking behind them, in a way not usually seen in scientifc publications. Published in the J Clinical Pathology, 2007 Definitions and aetiology of myalgic encephalomyelitis: how the Canadian consensus clinical definition of myalgic encephalomyelitis works Despite the title it's more of a philosophical work and I don't pretend to understand all of it, but he does make some interesting comments on the danger of the biopsychosocial model. I've picked out of few of my favourite quotes. On the Canadian Consensus criteria: On the biopsychosocial approach: Ok, it's not an easy read... In case you thought that people conjouring up a lopsided view of an illness is new, he quotes Thomas Sydenham, a 17th Century English Physician: He concludes by highlighting the dangers of not properly defining ME/CFS, using the example of the smile of the Cheshire Cat: I thought people might enjoy something different. Apologies if it's been posted before.