"op">(</span><span class="va">df_visit</span>, <span class="va">df_visit</span><span class="op">)</span><span class="op">)</span></span></span>
<span class="r-wrn co"><span class="r-pr">#&gt;</span> <span class="warning">Warning: </span>Duplicated visit entries for some patients detected and corrected.</span>
<span class="r-in"><span><span class="fu"><a href="https://rdrr.io/r/base/nrow.html" class="external-link">nrow</a></span><span class="op">(</span><span class="va">df_visit_corr</span><span class="op">