Tumor Growth (IMAGE) Duke University Caption A time series shows cells proliferating in a controlled environment. New cells are marked a, b, c, d. Credit Bean, et al. Mol. Cell, 2006. DOI: 10.1016/j. molcel.2005.10.035. 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.