8Kroger K,Niebel W,Maier I,et al.prevalence of Pressure ulcers in hospitalized patients in Germany in 2005:data from the Federal Statistical Office[J].Gerontology,2009,55(3):281-287.
9Edlich RF,Winters KL,Woodard CR,et al.Pressure ulcer prevention[J].J Long Term Eff Med Implants.2004,14(4):285-304.
10Wann-Hansson C,Hagell P,Willman A.Risk factors and prevention among patients with hospital-acquired and pre-existing pressure ulcers in an acute care hospital[J].Clin Nurs.,2008,17(13):1718-1727.
