Summary of assumptions and input data.

a<p>Pooled estimate from all studies selected and described in Bertholet et al. <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0005696#pone.0005696-Bertholet1" target="_blank">[10]</a>. A logistic random effects regression analyses with only a constant was carried to obtain the effect estimate and the uncertainty surrounding it.</p>b<p>Pooled estimate from all studies selected and described in the systematic review by Fiellin et al. <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0005696#pone.0005696-Fiellin1" target="_blank">[12]</a>. A logistic random effects regression analyses with only a constant was carried to obtain the effect estimate and the uncertainty surrounding it.</p>c<p>Bertholet et al. <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0005696#pone.0005696-Bertholet1" target="_blank">[10]</a>.