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Start Over Subjects Clinical Trials as Topic ✖Remove constraint Subjects: Clinical Trials as Topic Subjects Product Surveillance, Postmarketing ✖Remove constraint Subjects: Product Surveillance, Postmarketing Copyright Public domain ✖Remove constraint Copyright: Public domain Publication Year 1900 to 1999 ✖Remove constraint Publication Year: <span class="from" data-blrl-begin="1900">1900</span> to <span class="to" data-blrl-end="1999">1999</span>

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Current results range from 1981 to 1981