Charmaine Lok, University Health Network (IMAGE) University Health Network Caption Dr. Charmaine Lok, Medical Director of both the Chronic Kidney Diseases and Hemodialysis Programs at the Toronto General Hospital, University Health Network. Credit UHN 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.