[1] Yale Univ, Sch Med, Div Thorac Surg, Dept Surg, New Haven, CT 06520 USA
[2] Yale Univ, Dept Biostat, Sch Epidemiol & Publ Hlth, New Haven, CT 06520 USA
[3] Mem Sloan Kettering Canc Ctr, Thorac Serv, New York, NY 10021 USA
[4] Indiana Univ Sch Med, Div Med Oncol, Dept Internal Med, Indianapolis, IN USA