In this Monday, Feb. 27, 2017, photo, Cambridge Hospital first-year residents Samantha Harrington, center, and Vikas Gampa, right, talk during "sign-out" at the hospital in Cambridge, Mass. That's when the rookie doctors exchange information about their patients during shift change. Effective this summer, rookie doctors can work up to 24 hours straight under new extended limits. A Chicago-based group that establishes work standards for U.S. medical school graduates has eliminated a 16-hour cap for first-year residents. (AP Photo/Steven Senne)
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