1. Weiss AJ, Elixhauser A, Andrews RM. Characteristics of operating room procedures in U.S.hospitals, 2011. HCUP Statistical brief #170. February 2014. Available from: http://www.hcup-us.ahrq.gov/reports/statbriefs/sb170-Operating-Room-Procedures-United-States-2001.pdf
2. Profile of inpatient operating room procedures in US hospitals in 2007;A Elixhuaser;Arch Surg,2010
3. HCUP Cost-to-Charge Ratio Files (CCR). Healthcare Cost and Utilization Project (HCUP). 2001–2009. U.S. Agency for Healthcare Research and Quality.Updated September 2012. Available from: http://www.hcup-us.ahrq.gov/db/state/costtocharge.jsp
4. Finger KR, Stocks C, Weiss AJ, Steiner CA. Most frequent operating room procedures performed in US Hospitals, 2003–2012. HCUP Statistical brief, #186, December 2014. Agency for Healthcare Research and Quality. Available from: http://www.hcup-us.ahrq.gov/reports/statbriefs/sb186-Operating-Room-Procedures-United-States-2012.pdf
5. Preoperative thrombocytopenia and postoperative outcomes after noncardiac surgery;LG Glance;Anesthesiology,2014