Patient classification systems: the problems faced.
D006801:Humans; D009726:Nurses / Q000600:supply & distribution; D009732:Nursing Care / Q000145:classification*; D009738:Nursing Service, Hospital / Q000458:organization & administration*; D009741:Nursing Staff, Hospital / Q000523:psychology* / Q000706:statistics & numerical data; D010361:Patients; D013315:Stress, Psychological; D014481:United States; D000078329:Workforce