Supplemental nursing services: who uses them? Who does not?
D004469:Economics, Hospital; D004651:Employment; D009738:Nursing Service, Hospital; D009739:Nursing Services / Q000191:economics / Q000706:statistics & numerical data*; D010561:Personnel Staffing and Scheduling; D010563:Personnel Turnover; D012456:Salaries and Fringe Benefits; D014481:United States; D000078329:Workforce