1 Division of Cardiac Surgery, Veterans Affairs Boston Healthcare System, and Department of Surgery, Brigham and Women's Hospital, Harvard Medical School, Boston, Mass. Electronic address: Marco_Zenati@hms.harvard.edu.
2 STRATUS Center for Medical Simulation, Department of Emergency Medicine, Brigham and Women's Hospital, Boston, Mass.
3 Division of Cardiac Surgery, Veterans Affairs Boston Healthcare System, and Department of Surgery, Brigham and Women's Hospital, Harvard Medical School, Boston, Mass.