<p>There <s>is</s> <em>was</em> an existing tag named <code>[nnt]</code> (used in two questions). I made it a synonym of new tag <a href="https://stats.stackexchange.com/questions/tagged/number-needed-to-treat" class="post-tag" title="show questions tagged &#39;number-needed-to-treat&#39;" rel="tag">number-needed-to-treat</a> and merged them. </p>

<p>I also created an excerpt and a wiki for it.  </p>
