Chronic fatigue syndrome has the very unfortunate property of being a symptom, rather than a disease per se, so that it ends up being code for "undiagnosed". Th

Chronic fatigue syndrome has the very unfortunate property of being a symptom, rather than a disease per se, so that it ends up being code for "undiagnosed". This makes any research which attempts to study it extremely difficult to interpret and sensitive to details of the study population which may not be reported. This makes raw data especially important.