By Bertha Coombs, CNBC Reporter
NEW YORK ( CNBC) -- There are two things Dr. Larry Nathanson can't work without when he's on duty in the emergency ward: his stethoscope and his iPad. After nearly a year using the tablet, it has become an integral tool for treating patients. "As I am walking from room to room, I know who I need to see next," he explained, scrolling through the virtual emergency room patient board on the iPad. "I definitely feel lost when I don't have this on a shift," he said.
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