“…The characteristics of included studies are presented in Appendix Table 1, (available online). The studies primarily came from the United Kingdom (n=15), 18,20,24,26,28,[30][31][32][33]36,38,39,41,43,46 the U.S. (n=9), 19,22,23,29,37,40,42,48,49 and Australia (n=6), 17,27,35,44,45,47 with a smaller number from Italy (n=1), 21 and Sweden (n=2). 25,34 They included 29 peer-reviewed journal publications, three government reports, and one thesis.…”