1. PRISMA diagram of included studies. McRobbie, 2014. 8
PRISMA diagram of included studies. *McRobbie, **Further two publications from one RCT included by the Cochrane review were identified only in our search strategy. ***Further one publication from one cohort study identified by our search strategy was identified throughout the expert search.
PRISMA diagram of included studies. *McRobbie, **Further two publications from one RCT included by the Cochrane review were identified only in our search strategy. ***Further one publication from one cohort study identified by our search strategy was identified throughout the expert search.
Regina El Dib et al. BMJ Open 2017;7:e012680
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