title: Geographic variation and trends in carotid imaging among medicare beneficiaries, 2001 to 2006.
authors.affiliation: Duke Clinical Research Institute, Department of Medicine, Duke University School of Medicine, Durham, NC, USA. lesley.curtis@duke.edu
authors.forename: Lesley H
authors.initials: LH
authors.lastname: Curtis
authors.forename: Melissa A
authors.initials: MA
authors.lastname: Greiner
authors.forename: Manesh R
authors.initials: MR
authors.lastname: Patel
authors.forename: Pamela W
authors.initials: PW
authors.lastname: Duncan
authors.forename: Kevin A
authors.initials: KA
authors.lastname: Schulman
authors.forename: David B
authors.initials: DB
authors.lastname: Matchar