1. Pressure ulcer risk factors among hospitalized patients with activity limitation
2. 2S. Aronovitch (1998 )Hospital acquired pressure ulcers: a comparison of costs in medical versus surgical patients, 1-18, Atlanta. First Annual OR-Acquired Pressure Ulcer Symposium.
3. 4D.L. Bader (1992 )Pressure Sores: Clinical Practice and Scientific Approach, 2nd edn. The Macmillan Press Ltd, London.