<p><span style="color: rgb(65, 65, 65); letter-spacing: normal; orphans: 2; text-align: left; white-space: normal; widows: 2; word-spacing: 0px; display: inline !important; float: none;">Survey respondents with a history of cancer and those who have heard of ClinicalTrials.gov knew more about trials. Such knowledge also was more abundant among college graduates and those who had been asked to participate in a trial.</span> </p>