"::::::If it can be supported by WP:RS's, possibly. That said, I have been researching it and there are several reviews that say the same. Prins 2006 ""The most widely supported scientific case definition is the 1994 definition from the US Centers for Disease Control and Prevention, which is now considered the standard.13."" Wyller 2007 ""Different case-definitions exist; most widespread – in research as well as in clinical practice – is the one developed by the US Centers for Disease Control and Prevention, commonly referred to as the CDC-definition (3) (Table 1)."" There are more, but I don't feel like digging them all out. 

 ::::::But I also came across something I don't understand while searching PubMed. Searching chronic fatigue syndrome gives 4606 papers with 1029 reviews. Searching chronic fatigue syndrome AND myalgic encephalomyelitis gives the same results. Searching myalgic encephalomyelitis gives 4707 papers and 1034 reviews. I can't seem to replicate it on Google. Is PubMed substituting search terms?    

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