Dr. Hertzel Gerstein (image) McMaster University Share Print E-Mail Caption Dr. Hertzel Gerstein is a professor of medicine and endocrinologist of McMaster University and Hamilton Health Sciences. Photo courtesy Hamilton Health Sciences. Credit Hamilton Health Sciences Usage Restrictions None Share Print E-Mail 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.