Demographics of the study population (<i>n</i> = 697).

<p>Demographics of the study population (<i>n</i> = 697).</p

Age-related respiratory rate, from Liu et al. [10].

<p>Age-related respiratory rate, from Liu et al. <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0096189#pone.0096189-Liu1" target="_blank">[10]</a>.</p

Effect of chest radiography on antibiotic use.

<p>Effect of chest radiography on antibiotic use.</p