title: Innovation in hospital based ambulatory care: some sources, patterns, and implications of change.
authors.forename: D I
authors.initials: DI
authors.lastname: Regenstreif
mesh_terms: D000553:Ambulatory Care / Q000458:organization & administration / Q000639:trends*; D003153:Community Health Services / Q000458:organization & administration; D006123:Group Practice; D009518:New York; D010044:Outpatient Clinics, Hospital / Q000458:organization & administration / Q000639:trends*