Supplemental nursing agencies.
D006801:Humans; D007373:Interinstitutional Relations; D009741:Nursing Staff, Hospital / Q000600:supply & distribution*; D010559:Personnel Management / Q000639:trends*; D010561:Personnel Staffing and Scheduling / Q000639:trends*; D011787:Quality of Health Care; D012042:Registries / Q000458:organization & administration*; D012456:Salaries and Fringe Benefits / Q000639:trends; D014481:United States