Development of the 1994 Chronic Fatigue Syndrome Case Definition and Clinical Evaluation Guidelines

Illness Intrusiveness in Myalgic Encephalomyelitis

“…Accordingly, the International Study Group advising the Centers for Disease Control and Prevention (CDC) has recommended the use of stratification strategies, to facilitate the identification of specific subsets and help to clarify their aetiology (Fukuda, 1997;Fukuda et al, 1994).…”

“…The problem with the research on CFS is that the current criteria select a heterogeneous population, which has undermined efforts to identify the pathophysiological mechanisms underlying the onset and perpetuation of symptoms (Fukuda et al, 1994;Jason, Corradi, Torres-Harding, Taylor, & King, 2005). Accordingly, the International Study Group advising the Centers for Disease Control and Prevention (CDC) has recommended the use of stratification strategies, to facilitate the identification of specific subsets and help to clarify their aetiology (Fukuda, 1997;Fukuda et al, 1994).…”