Images of research achievements (IMAGE) National Research Council of Science & Technology Caption Image showing the preparation of hydrogels that enhance the viability of NK cells Credit Korea Institute of Machinery and Materials (KIMM) Usage Restrictions The sources of photos and research results from KIMM must be specified. 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.