Dr. Nicholas Howell (IMAGE) St. Michael's Hospital Caption Dr. Nicholas Howell, first author of the study and a PhD graduate in the Li Ka Shing Knowledge Institute of St. Michael's. Credit Dr. Nicholas Howell 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.