Abstract
The originally published version of this Article contained an incorrect version of Figure 3 that was introduced following peer review and inadvertently not corrected during the production process. Both versions contain the same set of abundance data, but the incorrect version has the children's asthma status erroneously disconnected from the abundance data, thereby producing the non-representative p values and graphic presentations. These errors have now been rectified, with the correct version of Figure 3 replaced in both the PDF and HTML versions of the Article.