Smartphone Attachment (image) Duke University Share Print E-Mail Caption The photo on the left shows the 3-D printed smartphone attachment that uses the phone's camera to review the results of the assay. The photo series on the right shows the process to administer a blood sample onto the D4 assay. Credit Credit: Daniel Joh, Duke University Usage Restrictions None Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.