7Wolff JL, Starfield B, Anderson G. Prevalence, expenditures, and complications of multiple chronic conditions in the elderly [ J ]. JAMA,2002,162 ( 20 ): 2269 ~ 2276.
8Creditor MC. Hazards of hospitalization of the elderly[ J]. Ann Intern Med,1993,118(3) :219 ~223.
9Riedinger JL, Robbins LJ. Prevention of iatrogenic illness: Adverse drug reactions and nosocomial infections in hospitalized older adults [J]. Clin Greriatr Med,1998,14(4): 681 ~698.
10Kovner CT,Mezey M,Harrington C. Who cares for older adult? Workforce implications of an aging society [ J ]. Health Affairs, 2002,21(5) :78 ~89.