The Geisinger health care system.
D006279:Health Maintenance Organizations / Q000458:organization & administration; D006754:Hospital Restructuring; D006780:Hospitals, Rural / Q000458:organization & administration; D008962:Models, Theoretical; D009096:Multi-Institutional Systems / Q000458:organization & administration*; D010414:Pennsylvania; D012106:Research; D019966:Substance-Related Disorders