The fatigue severity scale (FSS) questionnaire will be used to assess the fatigue status of patients at baseline and post-intervention through a face-to-face interview. This questionnaire contains 9 questions each ranging from 1 (strong disagreement) to 7 (strong agreement) with an overall score of 9–63. Patients will be interpreted further as with mild, moderate, and severe fatigue for a total point of 0–21, 22–42, and 43–63, respectively [30 (link)]. This questionnaire was validated among the Iranian population previously [31 ].
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