Here’s a cheery thought to kick off your holiday: The first two leading causes of death in the United States are heart disease and cancer. The third leading cause? Medical errors. Researchers at the Johns Hopkins School of Medicine found that mistakes in prescribing drugs, miscues in surgery, and miscommunication between care givers leads to an astonishing number of preventable deaths every year. One of the authors of the study, Dr. Michael Daniel , explains how the medical community is