It's another short descriptive post today as I bring the paper by Len Jason & Madison Sunnquist  to your attention charting "the development of the DePaul Symptom Questionnaire (DSQ) to assess symptoms of the major chronic fatigue syndrome (CFS) and myalgic encephalomyelitis (ME) case definitions."
I say this is a descriptive post because the Jason/Sunnquist paper provides some important technical details about the DSQ and its evolution; all from a research group who seem to be pretty clued into ME/CFS and its very wide range of clinical presentation (see here).
There are some important aspects included in the paper; not least a focus on the issue of post-exertional malaise (PEM), something which has been a real focus to these researchers (see here). The other very welcomed side to the Jason/Sunnquist paper are the various links to the DSQ derivatives all provided free of charge.
 Jason LA. & Sunnquist M. The Development of the DePaul Symptom Questionnaire: Original, Expanded, Brief, and Pediatric Versions. Front Pediatr. 2018;6:330.