Demographic characteristics and respiratory history of the cohort.

Abstract

<p><sup>§</sup> scored according to a modified Bhalla scale as previously reported [<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0129517#pone.0129517.ref013" target="_blank">13</a>].</p><p>Demographic characteristics and respiratory history of the cohort.</p

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