Pain and Muscle Biopsy

"A questionnaire (including the NRS) will be given to the patient on the day of the procedure, immediately after the biopsy, in the treatment room and without staff intervention (responses will be analyzed by two study investigators at a later date).~The patient health questionnaire (PHQ-9) will also be provided at the same time as the self-report questionnaire, for the assessment of depressive symptoms.~Assessment of the participant's frailty using the Clinical Frailty Scale (CFS) will be carried out prior to the procedure.~Further data will be collected by telephone by a study investigator 15 +/- 2 days after the biopsy and 30 +/- 2 days after the biopsy."