3Wound,Ostomy and-Continence Nurses Society.Prevalence and incidence: a toolkit for clinicians:monitoring prevalence and incidence of pressure ulcers[J]. Professional Practice Manual,2004:212-223.
4McInerney JA. Reducing hospital-acquired pressure ulcer prevalence through a focused prevention program[J]. Advances in Skin & Wound Care, 2008,21 (2) :75-78.