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        <article-title>!</article-title>
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    <p>X<sup>2</sup><xref alt="1" rid="ref-1" ref-type="bibr">1</xref></p>
    <p>OneToThree<sup>(<xref rid="ref-1" ref-type="bibr">1</xref>-<xref rid="ref-hartl_essential_2006" ref-type="bibr">3</xref>)</sup></p>
    <p><bold>Two<sup><xref alt="2" rid="ref-himmelstein_open_2019" ref-type="bibr">2</xref></sup></bold></p>
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      <title>OneThree<sup><xref rid="ref-1" ref-type="bibr"></xref>,<xref rid="ref-hartl_essential_2006" ref-type="bibr"></xref></sup></title>
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          <year iso-8601-date="1969">1969</year>
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            <name><surname>Himmelstein</surname><given-names>Daniel S.</given-names></name>
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          <year iso-8601-date="2019-06">2019</year><month>06</month>
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          <pub-id pub-id-type="doi">10.1371/journal.pcbi.1007128</pub-id>
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