Paul Sponseller, Johns Hopkins Medicine (IMAGE) Johns Hopkins Medicine Caption Dr. Sponseller and colleagues conducted research to better define the risk of dangerous blood clot formation in children following a common spinal surgery. Credit Johns Hopkins Medicine 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.