1. Healthcare Cost and Utilization Project (HCUP). Nationwide inpatient sample (NIS). . Accessed July 8, 2012.
2. A prospective study of 80,000 total joint and 5000 anterior cruciate ligament reconstruction procedures in a community-based registry in the United States;Paxton;The Journal of Bone&Joint Surgery,2010
3. Association of hospital and surgeon procedure volume with patient-centered outcomes of total knee replacement in a population-based cohort of patients age 65 years and older;Katz;Arthritis and Rheumatism,2007
4. Medicare fee schedules,2010
5. Medicare hospital inpatient prospective payment system,2010