tml'>obs_proportional</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='op'>(</span><span class='va'>ed50</span><span class='op'>+</span><span class='va'>dose</span><span class='op'>)</span><span class='op'>)</span>
</div></pre>
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