Edited by Richard B. Birrer, MD, MPH, CEO and president, eMD LLC; and professor of medicine, Cornell University Medical College, New York, New York Francis G. O'Connor, MD, MPH, professor and chair, Uniformed Services University of the Health Sciences, Bethesda, Maryland, USA Shawn F. Kane, MD, Uniformed Services University of the Health Sciences, Bethesda, Maryland, USA