Issues and methological problems in nurse staffing research.
D003625:Data Collection / Q000379:methods; D006801:Humans; D015399:Nursing Research / Q000379:methods*; D009740:Nursing Staff / Q000600:supply & distribution*; D010361:Patients / Q000145:classification*; D010559:Personnel Management; D010561:Personnel Staffing and Scheduling; D015203:Reproducibility of Results; D013997:Time Factors