This scoping review does not require ethics approval as it is a secondary review of the literature. Based on the results of this review, we will disseminate our findings of both reliable evidence (where it exists) or a gap in reliable evidence and a need for additional research. This dissemination will be carried out through presentations at relevant conferences and publication in a peer-reviewed open-access journal. As mentioned above, we will also disseminate the findings to community and patient stakeholders. We will ask these stakeholders to join with clinical and research stakeholders to identify the best ways to address any critical existing gaps in the evidence (eg, a focused systematic review, further randomised trials) and prioritise the next steps.