160;        <span class="keywordflow">if</span>( present(units) ) <span class="keywordflow">then</span></div>
<div class="line"><a name="l00087"></a><span class="lineno">   87</span>&#160;            effunits = units</div>
<div class="line"><a name="l00088"></a><span class="lineno">   88</span>&#160;        <span class="keywordflow">else</span></div>
<div class="line"><a name="l00089"></a><span class="lineno">   89</span>&#160;            effunits = [1.0_8, 1.0_8]</div>
<div class="line"><a name="l00090"></