Search strategy
Searches of Medline, EMBASE, The Cochrane Library (Cochrane Database of Systematic Reviews, Cochrane Central Register of Controlled Trials (CENTRAL), Cochrane Methodology Register, Cumulative Index of Nursing and Allied Health Literature (CINAHL) and ClinicalTrials.gov were undertaken from the start of indexing to 30th November 2018. Searches were limited to RCTs, feasibility and pilot studies including at least one intervention or device used for AVB (Table S1).