5Assino S, Abbate DG. Quality of life in dependent older adults living at home[J]. Arch Gerontol Geriatr,2002,35(1) :9 - 20.
6Li YS, Thornby J. Longitudinal follow - up of depressive symptoms among normal versus cognitively impaired elderly[J], lnt J Geriatr Psyclfiatry, 2001,16,718 - 727.
7Goldgerg J, True WR, Eisen SA, et al. A twin study of the effects of the Vietnam war on posttraumatic stress disorder [J]. JAMA, 1990,263 : 1227 - 1232.
8The Iowa Persian Gulf study. Self- reported illness and health status among Gulf War vererans: a poulation - based study [ J ]. JAMA, 1997,277 : 238 - 245.
9Haley RW, Kurt TL, Hom J. Is there a Gulf war syndrome .9 Searching for syndrome by factor analysis of symptoms[J]. JAMA, 1997,277:215 - 222.