ormal</a></span><span class='op'>(</span><span class='st'>"ed50"</span>, median <span class='op'>=</span> <span class='fl'>50</span>, var_log <span class='op'>=</span> <span class='fl'>0.09</span><span class='op'>)</span> <span class='op'>+</span>
  <span class='fu'><a href='algebraic.html'>algebraic</a></span><span class='op'>(</span><span class='va'>effect</span><span class='op'>~</span><span class='va'>emax</span><span class='op'>*</span><span class='va'>dose</span><span class='op'>/</span><span class='o