1Garcia- Alvarez F, Gonzalez P, Navarro -Zorraquino M, et al. Im- mune cell variations in patients with hip fracture [ J ]. Arch Gerontol Geriatr, 2008, 46 (2) : 117 -124.
2Hayes DK, Greenlund K J, Denny CH, et 81. Racial~ethnic and socio- economic disparities in health - related quality of life among people with coronary heart disease [J]. Prey Chronic Dis, 2011, 8 (4) : A78.