n><span class='op'>[</span><span class='fl'>1</span><span class='op'>:</span><span class='fl'>6</span><span class='op'>]</span>,
                 QSSTAT  <span class='op'>=</span> <span class='st'>""</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 12"</span>, <span class='st'>"Week 24"</span>, <span class='st'>"Week 1"</span>, <span class='st'>"Wee