Recruitment of interview participants
To capture a range of experiences of implementing and using the intervention, the research team identified HCPs who were involved in the implementation and patients who had remained in the trial to participate in the current study. Twenty patients were selected purposively and invited by telephone, and a maximum variation sample was sought based on age and sex characteristics. Ten HCPs were identified and invited via email. Due to the scope of the ethical approval, patients who withdrew from the trial could not be recruited into the current qualitative study.