Francis Worden, University of Michigan (IMAGE) Michigan Medicine - University of Michigan Caption Here are Francis Worden, M.D., and Heidi Mason, R.N., N.P. from the University of Michigan. Credit University of Michigan Comprehensive Cancer Center Usage Restrictions for use in conjunction with stories about this research 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.