“…As shown in Table 2, Facilities category ( n = 35) was the most highly cited category in all the eligible studies, 32–66 then Legislation or regulations ( n = 19), 32,37,39,44,46,48–51,53,56,57,59,67–72 Knowledge and skills ( n = 18) 32,37,39,44,45,48,50,53,55–57,59,66,69,72–76 and Attitudes regarding programme acceptability, appropriateness and credibility ( n = 16) 32,33,35,37,44,45,48,49,52,55,56,69,72,73,75,76 categories. Accessibility of care ( n = 1) and Short‐term thinking ( n = 1) had the least number of barriers and challenges.…”