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Table 1 Inclusion and exclusion criteria

From: Testing the efficacy of web-based cognitive behavioural therapy for adult patients with chronic fatigue syndrome (CBIT): study protocol for a randomized controlled trial

1) ≥ 18 years.  
2) Able to speak, read, and write Dutch.  
3) Able to use a computer and have access to Internet.  
4) CFS diagnosis according to the CDC consensus criteria: [1, 2]
5) Severe fatigue is assessed with the subscale fatigue severity of the Checklist Individual Strength (CIS). Severe fatigue is operationalized as scoring ≥ 35. [23]
6) Disabilities; Disability is assessed with the total score of the Sickness Impact Profile (SIP8). Severe disability is operationalized as a total score ≥ 700 on the SIP8. [27, 41]
7) Given written informed consent.  
Exclusion criteria  
1) Engaged in a legal procedure concerning disability-related financial benefits.  
2) Participating in other CFS research.