Scent Pens (IMAGE) Cell Press Caption This image shows the scent pens used in the smell test. Credit Jón Gústafsson, deCODE Genetics - Amgen Inc Usage Restrictions Credit required License Licensed content 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.