6Bergstrom N,Brachen B.A prospective study of Pressure score risk among institutionalized elderly.Journal of the American Geriatrics Society,1992.40:748-758.
7Woodbury MG.Houghton P.Prevalance of pressure ulcas in Canadian healthcare settings.Ostomy Wound Management,2004,50:22-38.
8Atiyeh BS, Amm CA, E1 Musa KA. Improved scar quality following primary and secondary healing of cutaneous wounds. Aesthetic Plast Surg, 2003, 27:411-417.