Citations were managed in EndNote; titles, abstracts, and full texts were screened, with 10% independently screened by two reviewers.



EndNote
A realist review of literature was conducted with searches completed in three stages: (1) to construct hypotheses in the form of Context, Mechanism, Outcome configurations (CMOc) about how MFRAs and interventions are delivered, (2) to scope the breadth and depth of evidence available in Embase to test the CMOcs, and (3) following prioritisation of CMOcs, to refine search strategies for use in multiple databases. 
Embase
PROSPERO: CRD42020184458.
PROSPERO