6Knaus W A, Drager E A, Wager D P, et al. APACHE Ⅱ: a severity of disease classification [J].Crit Care Med. 1985,13(10):818.
7Pyykko A K. Ala-Kokko T I, Laurila J J, et al. Nursing staff resources in direct patient care: comparison of TISS and ICNSS [J]. Acta Anaesthesiol Scand.2004,48(8) :1003.
8Gomez Ferrero (), Mateo Marin E, Marin Vio G, et al. Care levels in an intensive care unit. Analysis of therapeutic requirements and severity scales [J]. Enferm Intensive, 1999 ,10(1):13.
10Centers for Disease Control.1993 revised classification system for HIV infection and expanded surveillance case definition for AIDS among adolescents and adults.MMWR,1992,41:RR-17.