ain animals are included
in the output set. These uncertain situations are identified and reported (in
column UNCERTAIN_MSG):</p><ul><li><p>TX parameter 'TCNTRL' is missing</p></li>
<li><p>TXVAL for TX parameter 'TCNTRL' cannot be identified as Negative or
Positive control according to the algorithm described above</p></li>
</ul></div>

    <div id="ref-examples">
    <h2>Examples</h2>
    <div class="sourceCode"><pre class="sourceCode r"><code><span class="r-in"><span class="kw">if</span> <span cl