Limitations
There are limitations of this review that require acknowledgement.
Firstly, widening the search period to allow for research pre 2006 would
have resulted in more papers eligible for inclusion. However, due to
resourcing and time restraints, review of more than 12 papers was not
manageable and was beyond the scope of this review. Excluding papers on
a language basis (only including those written in English) may have also
impacted the findings of this review and high quality and relevant
findings may have inadvertently been missed as a result of the
inclusion/exclusion criteria. Lastly, as previously identified, the
findings of the review are in part dependent on the choice of critical
appraisal tool and the application of other critical appraisal tools to
the same literature may have yielded different results.