Figure legends
Figure 1 Characterization of the studies included based on outer or
inner layer biodiversity.
Figure 2 Forest plot for the association between Shannon diversity index
and asthma.
Figure 3 Forest plot for the association between bacterial richness and
asthma.
Figure 4 Forest plot for
the standardized mean difference
of the Shannon diversity index among individuals with and without
asthma.
Figure 5 Forest plot for the
standardized mean difference of the bacterial richness among individuals
with and without asthma.
Figure 6 Forest plot for the association between bacterial richness and
asthma.