1. Long-term results with triple valve surgery;Carrier;Ann. Thorac. Surg.,2002
2. Short- and long-term results of triple valve surgery in the modern era;Alsoufi;Ann. Thorac. Surg.,2006
3. Clinical outcome after triple-valve operations in the modern era: are elderly patients at increased surgical risk?;Pagni;Ann. Thorac. Surg.,2014
4. HCUP Nationwide Inpatient Sample (NIS) Healthcare Cost and Utilization Project (HCUP), (n.d.). www.hcup-us.ahrq.gov/nisoverview.jsp (accessed July 15, 2016)..
5. Comorbidity measures for use with administrative data;Elixhauser;Med. Care,1998