Gordon Guyatt, McMaster University (IMAGE) McMaster University Caption This is Dr. Gordon Guyatt, chair of the guideline committee and a professor at McMaster University. Credit McMaster University 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.