<span class="citations"><p>Dai-Wu Seol, "DNA cassette for the production of secretable recombinant trimeric TRAIL proteins, tetracycline/ doxycycline-inducible adeno-associated virus vector, their combination and use in gene therapy." U.S. Patent US20020128438, issued September 12, 2002.</p>
</span><a href="https://www.google.com/?tbm=pts#q=20020128438&amp;tbm=pts" rel="noopener" target="_blank">US20020128438</a>