Strengths and limitations
The main limitation of our study is the small sample size and random
assignment of patients. As this study was initially designed as a pilot
study, patients were not systematically invited to participate and
therefore patients who met the inclusion criteria may have been missed.
We did not collate numbers of patients who declined to participate on
initial invitation, which would have allowed us to analyse the
proportion of patients whom responded, in the context of the total
number of patients that were eligible for participation.