Lab Chip Closeup (IMAGE) Johns Hopkins University Caption Tiny tubes connected to the chip carry a fluid that behaves like the bloodstream, allowing the Johns Hopkins researchers to study how metastasis occurs. Credit Will Kirk/Johns Hopkins University Usage Restrictions None 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.