6</span>, <span class='fl'>84</span>, <span class='fl'>112</span>, <span class='fl'>1</span>, <span class='fl'>28</span>, <span class='fl'>56</span>, <span class='fl'>84</span>, <span class='fl'>112</span>, <span class='fl'>140</span><span class='op'>)</span>,
                 VISIT   <span class='op'>=</span> <span class='fu'><a href='https://rdrr.io/r/base/c.html'>c</a></span><span class='op'>(</span><span class='st'>"Week 1"</span>, <span class='st'>"Week 4"</span>, <span class='st'>"Week 8"</span>, <spa