1. Pressure Ulcer Stages Revised by NPUAP [on-line] http://www.npuap.org/pr2.htm
2. Medicare Program; Changes to the Hospital Inpatient Prospective Payment Systems and Fiscal Year 2008 Rates [on-line] http://www.cms.hhs.gov/AcuteInpatientPPS/downloads/CMS-1533-FC.pdf
3. Healthy People [on-line] http://www.healthypeople.gov/Document/HTML/Volume1/01Access.htm
4. Hospital Payment Monitoring Program: Monitoring and Reducing Missouri's Payment Error Rate [on-line] http://www.primaris.org/sites/default/files/resources/HPMP/hpmp%20info%20sheet.pdf