Electronic Health RecordsMeaningful UseMedical Records Systems, ComputerizedAmbulatory Care Information SystemsAmerican Recovery and Reinvestment ActAttitude to ComputersDiffusion of InnovationComputer SecurityMedical InformaticsWorkflowPractice Management, MedicalEfficiency, OrganizationalGroup PracticeConfidentialityPrivacyDecision Support Systems, ClinicalPharmacovigilanceOrganizational InnovationTime and Motion StudiesSystems IntegrationMedical Record LinkageInformation SystemsHealth Care SurveysHealth Plan ImplementationUnited StatesDocumentationHospital Information SystemsData MiningPhysiciansMassachusettsNew York CityQuality of Health CareAttitude of Health PersonnelAmbulatory CarePhysician's Practice PatternsData CollectionPrimary Health CareInformation Storage and RetrievalUser-Computer InterfaceSoftwareCross-Sectional StudiesQuestionnaires