Full-text screening

We identified 319 studies for full-text review. We downloaded the documents into Covidence from OA journals and repositories and by accessing our institutional journal subscriptions and interlibrary loan services. For full-text screening, we adopted a process similar to that employed during title and abstract screening. Pilot testing involved assigning a random set of studies to each reviewer and then discussing and improving the process as a team. We resolved disagreements between reviewers during our regular meetings and tracked our decisions to include or exclude in Covidence.