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.