Defining service populations for hospitals.
D002391:Catchment Area, Health; D003625:Data Collection; D005069:Evaluation Studies as Topic; D005544:Forecasting; D006761:Hospitals / Q000706:statistics & numerical data*; D008962:Models, Theoretical; D010351:Patient Discharge; D011157:Population Dynamics; D013223:Statistics as Topic; D014481:United States; D014728:Veterans