t">"mcid"</span><span class="op">)</span><span class="op">]</span></span>
<span><span class="va">DT</span></span>
<span><span class="co">#&gt;                  mcid  proxy   cip6</span></span>
<span><span class="co">#&gt;                &lt;char&gt; &lt;char&gt; &lt;char&gt;</span></span>
<span><span class="co">#&gt;     1: MCID3111142689   &lt;NA&gt; 090401</span></span>
<span><span class="co">#&gt;     2: MCID3111142782   &lt;NA&gt; 260101</span></span>
<span><span class="co">#&gt;     3: MCID3111142881  