Glass filter (IMAGE) Nagoya University Caption Researchers developed glass filters with optimal sizes of holes with specific patterns that can separate tumor cancer-associated cells from blood. Credit Hiromasa Tanaka, Center for Low-temperature Plasma Sciences Usage Restrictions Credit must be given License Original 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.