C7. Data Collection, Data Entry, and Back-Up: Data entry and follow-up of subjects will be accomplished by taking advantage of the research infrastructure in place at the Department of Emergency Medicine of the Albert Einstein College of Medicine. Five full-time research assistants and one research clerk are funded by the department. The research assistants are medical technician level, full-time employees who have extensive clinical research experience and have passed required research ethics courses. These research assistants staff the Montefiore ED during all operational hours.