Synthesis
We reported the number of eligible studies according to design, sample
size, methodological quality / risk of bias, and proportions and
measures of association for primary outcomes for each practice. We did
not report results for secondary outcomes considering the large number
of retained studies and the fact that results on secondary outcomes led
to the same conclusions. Similarly, we did not conduct meta-analysis or
assess the credibility of evidence because identified studies on the
same practice were either all case series (no measures of association)
or evaluated different outcomes.