Daren Heyland, Queen's University (IMAGE) Queen's University Caption Dr. Daren Heyland (Queen's University, Ontario, Canada) is the scientific director of the Technology Evaluation in the Elderly Network (TECH VALUE NET) and is the lead author of a recent Critical Care Medicine paper that suggests measuring the levels of a natural body chemical called procalcitonin may allow clinicians to better guide antibiotic use in critical care settings. Credit Queen's University 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.