[1] Univ Penn, Dept Med, Div Pulm Allergy & Crit Care Med, Perelman Sch Med, Philadelphia, PA 19104 USA
[2] Univ Penn, Dept Med, Div Hematol Oncol, Perelman Sch Med, Philadelphia, PA 19104 USA
[3] Univ Maryland, Sch Med, Div Thorac Surg, Baltimore, MD 21201 USA
[4] Univ Penn, Dept Radiol, Perelman Sch Med, Philadelphia, PA 19104 USA
[5] Univ Penn, Dept Biostat & Epidemiol, Perelman Sch Med, Philadelphia, PA 19104 USA
[6] Univ Penn, Dept Pathol & Lab Med, Perelman Sch Med, Philadelphia, PA USA
[7] Merck & Co Inc, Kenilworth, NJ USA
[8] Wistar Inst Anat & Biol, 3601 Spruce St, Philadelphia, PA 19104 USA
[9] Univ Penn, Dept Radiat Oncol, Perelman Sch Med, Philadelphia, PA 19104 USA
[10] Univ Texas Southwestern Med Ctr Dallas, Dept Clin Sci, Dallas, TX 75390 USA
[11] Southern Methodist Univ, Dept Stat Sci, Dallas, TX USA
[12] Mem Sloan Kettering Canc Ctr, Div Biostat, Dept Epidemiol & Biostat, New York, NY 10021 USA
[13] NYU, Langone Med Ctr, Div Pulm Crit Care & Sleep Med, Dept Med, New York, NY USA
[14] NYU, Langone Med Ctr, Div Pulm Crit Care & Sleep Med, Dept Cardiothorac Surg, New York, NY USA