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2. Centers for Disease Control and Prevention 2012 Meaningful use introduction [Internet] http://www.cdc.gov/ehrmeaningfuluse/introduction.html
3. Centers for Medicare and Medicaid Services 2012 Meaningful use http://www.cms.gov/Regulations-and-Guidance/Legislation/EHRIncentivePrograms/Meaningful_Use.html
4. Use and characteristics of electronic health record systems among office-based physician practices: United States, 2001-2012;Hsiao;NCHS Data Brief,2012
5. Jamoom , E. Beatty , P. Bercovitz , A. Woodwell , D. Palso , K. Rechtsteiner , E. 2012 Physician adoption of electronic health record systems: United States, 2011