We take this very seriously. First, we ask potential participants to confirm that they have been diagnosed with ME or CFS by a health professional. Secondly, they will be asked to complete the DecodeME questionnaire which has been designed to rigorously assess participants against the diagnostic criteria we are using for this study.

Note: The DecodeME questionnaire is not designed to diagnose ME or CFS; it is to make sure participants meet the requirements for the study.