The distribution of evidence across interventions and themes: the numbered circles reflect the citation numbers of included papers. Credit: British...
systematic
Search strategy resultsThe initial search yielded 6,704 results. After deduplication, 5,501 papers underwent title and abstract screening (Fig. 2). This...
The study selection process is outlined on the PRISMA flow diagram (Fig. 1). A total of 5510 studies were retrieved. After...
