Colorful Clones (IMAGE) Harvard Medical School Caption Color-labeling blood stem cells allows HSCI researchers to track how they respond to transplantation or stress. Credit Vionnie Yu Usage Restrictions With appropriate caption and credit. 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.