Methodology
Systematic reviews and meta-analyses rigorously assess research evidence, usually concentrating on gold standard studies including randomised controlled trials (RCTs). There was a clear lack of RCTs in this area therefore an integrative review method was chosen. This approach permits an integrated assessment and comparison of many different research methods (e.g., experiment, semi-structured interview etc.), regardless of design [34]. An integrative review routinely consists of five stages of work: search strategy, search outcome, data extraction, data evaluation and data synthesis [35]. These stages are outlined below with reference to our particular study.