Dr. Levine earned his MD at Harvard Medical School and is currently a neurology professor and attending physician at the University of Pennsylvania Hospital as well as co-author of Monitoring in Neurocritical Care.

Dr. Levine earned his MD from Columbia University and is currently a cardiology professor at Baylor College and Director of Cardiac Care at Michael E. DeBakey Medical Center as well as author of Cardiology Secrets, 4th Edition.

Dr. Lewin completed his MD at Keck School of Medicine at USC and is currently Chief of the Division of Cardiology at Seattle Children’s Hospital as well as co-author of Echocardiography in Congenital Heart Disease.

Dr. Libby is an author of numerous texts within the field of cardiology, including Braunwald's Heart Disease, 9th Edition. He is currently a professor at Harvard Medical School as well as Chief of Cardiovascular Medicine at Brigham & Women's Hospital.

Andrew Lichtman, MD, PhD is co-author of Basic Immunology, 4th Edition and a Professor in the Department of Pathology at Harvard Medical School and Brigham and Women’s Hospital in Boston.