p</a></span><span class='op'>(</span><span class='fl'>1</span>, <span class='fl'>3</span><span class='op'>)</span>,
 USUBJID <span class='op'>=</span> <span class='fl'>1</span><span class='op'>:</span><span class='fl'>3</span>,
 AEDTHDTC <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'>"2020-01-01"</span>,<span class='st'>"2020-01-02"</span>,<span class='st'>"2020-01-03"</span><span class='op'>)</span>,
 AESPID <span cla