Twisk, Frank N M Letter to the Editor: Myalgic Encephalomyelitis and Chronic Fatigue Syndrome: Definitions, Similarities, and Differences. [electronic resource] - Clinical therapeutics 05 2019 - 1002-1003 p. digital Publication Type: Letter; Comment ISSN: 1879-114X Standard No.: 10.1016/j.clinthera.2019.03.010 doi Subjects--Topical Terms: FatigueFatigue Syndrome, ChronicFibromyalgiaHumans