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Association between β2-Adrenoceptor Gene Polymorphisms and Asthma Risk: An Updated Meta-Analysis

Figure 1

Flow Diagram for Inclusion of Studies in Meta-analysis.

The initial search identified 2205 articles, of which, 37 were included in the final analysis.

Figure 1

doi: https://doi.org/10.1371/journal.pone.0101861.g001