Confocal microscopy images (IMAGE) University of Warwick Caption Confocal microscopy images showing live/dead staining of 3D cell constructs. The top row shows a fresh spheroid. The middle row shows the outcome of conventional cryopreservation and the bottom row the outcome of the new approach, which yields a much greater fraction of live cells post-thaw. Credit Credit University of Warwick. Usage Restrictions Credit University of Warwick. 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.