n class="n">join</span><span class="p">(</span><span class="n">test_study_names</span><span class="p">)</span>
<span class="n">pkfilter</span> <span class="o">=</span> <span class="n">PKFilter</span><span class="p">()</span>
<span class="k">for</span> <span class="n">df_key</span> <span class="ow">in</span> <span class="p">[</span>
    <span class="s2">&quot;studies&quot;</span><span class="p">,</span>
    <span class="s2">&quot;groups&quot;</span><span class="p">,</span>
    <span class="s2">&quot;individu