e only 2 chains. Extra args are passed to stan</span>
<span class='kw'>if</span> (<span class='fl'>FALSE</span>) {
<span class='no'>sims</span> <span class='kw'>&lt;-</span> <span class='fu'>efftox_simulate</span>(<span class='no'>dat</span>, <span class='kw'>num_sims</span> <span class='kw'>=</span> <span class='fl'>10</span>, <span class='kw'>first_dose</span> <span class='kw'>=</span> <span class='fl'>1</span>,
                        <span class='kw'>true_eff</span> <span class='kw'>=</span> <span class