Electronic Health Records in Ambulatory Care: a National Survey of Physicians Author: DesRoches, Catherine M.; Campbell, Eric G; Rao, Sowmya R; Donelan, Karen; Ferris, Timothy G; Jha, Ashish; Kaushal, Rainu ; Levy, Douglas E; Rosenbaum, Sara; Shields, Alexandra E; Blumenthal, David Source: External web site Publication Date: June 18, 2008