Darryl Leong (IMAGE) McMaster University Caption Darryl Leong, co-lead author of the study, scientist at the Population Health Research Institute and assistant professor of medicine at McMaster University Credit Population Health Research Institute Usage Restrictions To be used with stories on this topic. 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.