span><span class="p">(</span><span class="nb">set</span><span class="p">([</span><span class="n">recruitment_times</span><span class="p">[</span><span class="n">x</span><span class="o">-</span><span class="mi">1</span><span class="p">]</span> <span class="o">+</span> <span class="n">interim_analysis_time_delta</span>
                                           <span class="k">for</span> <span class="n">x</span> <span class="ow">in</span> <span class="n">interim_analysis_after_patients</span> <span class="k">