For information regarding Do-Not-Track and how to enable this setting if available on your devices, please see https://allaboutdnt.com.</p> (4) Information Received from Third Parties <p>We may also obtain data from third-party sources such as a registrant's authorized representative or guardian, our customers or vendors such as data providers. Our data providers include Human API and iPatient Axis, the entities that we partner with to provide free patient medical record retrieval for clinical trial recruitment.