1. The CarboMedics valve;Fiane;Ann Thorac Surg,1995
2. An international experience with the CarboMedics prosthetic heart valve;Copeland;J Heart Valve Dis,1995
3. Guidelines for reporting morbidity and mortality after cardiac valvular operations;Edmunds;Ann Thorac Surg,1996
4. Epidemiologic research;Kleinbaum,1982
5. Statistical methods for survival data analysis;Lee,1980