Randomization and blinding
A researcher/GP trainee confirmed eligibility, gained signed informed consent, collected baseline data, and enrolled the participant in the study. Randomization was performed using the computer program ALEA, which allowed full concealment of group allocation.23Participants were randomised with 1:1 allocation and random block sizes stratified at the GP level.12 The study design meant that we could not blind participants or care providers to treatment allocation.