ass="r-out co"><span class="r-pr">#&gt;</span>   .. ..$ site_id   : chr "site_id"</span>
<span class="r-out co"><span class="r-pr">#&gt;</span>   .. ..$ patient_id: chr "patient_id"</span>
<span class="r-out co"><span class="r-pr">#&gt;</span>   .. ..$ visit     : chr "visit"</span>
<span class="r-out co"><span class="r-pr">#&gt;</span>   ..- attr(*, "class")= chr "orivisit"</span>
<span class="r-out co"><span class="r-pr">#&gt;</span>  $ df_site     : tibble [5 × 5] (S3: tbl_df/tbl/data.frame)</span>
<spa