Salim Yusuf (IMAGE) McMaster University Caption Salim Yusuf, principal investigator of the study, executive director of Population Health Research Institute and a professor of medicine at McMaster University Credit Hamilton Health Sciences Usage Restrictions To be used 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.