Tara Gomes, St. Michael's Hospital (IMAGE) St. Michael's Hospital Caption The rate of opioid use in Canada has fallen 13.7 percent since the publication in May 2010 of national guidelines for their use in chronic non-cancer pain, according to a study by Tara Gomes, a scientist at the Li Ka Shing Knowledge Institute of St. Michael's Hospital. Credit Courtesy of St. Michael's Hospital 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.