Assessing the level of healthcare information technology adoption in the United States: a snapshot. - Eric G. Poon; Ashish K. Jha; Melissa Christino; Melissa M. Honour; Rushika Fernandopulle; Blackford Middleton; Joseph Newhouse; Lucian Leape; David W. Bates; David Blumenthal; Rainu Kaushal (BMC Medical Informatics Decis. Mak., 2006)