Simon Wesley was a young and ambitious psychiatrist .

Neurologists referred to him (like they always do) patients in which they could not find a cause for their "unexplained" weakness.
I believe that Wesley truly wanted to help those patients, but also saw this as a great opportunity to make a name for himself, as the one who found the solution for their problem.

His way to solve the problem was to make a questionnaire and give this questionnaire to those patients with "unexplained" disease and patients with known neuromuscular disorders (such as MG). And also to patients with depression.

Among the MG patients were patients with "pure" MG (=those whose all their symptoms could be explained ) and patients with a combination of MG and "unexplained" symptoms.

The questionnaires of the patients with chronic unexplained fatigue were most similar to those of MG patients with depression. (=patients whose some of their symptoms could not be explained by MG, but still had diagnostic tests).

This "landmark" paper was published in the JNNP. (instead of being thrown out by the reviewers). Not only that, it became one of the most cited papers.

http://jnnp.bmj.com/content/83/1/4.full

I came across it trying to understand why neurologists assume that MG symptoms they can't explain are caused by "emotional problems".

It made me think that at least some CFS patients are probably MG patients with normal tests.