1 Division of Thoracic Surgery, Department of Surgery, Keck School of Medicine, The University of Southern California, 1510 San Pablo St, Ste 514, Los Angeles, CA 90033.
2 Division of Thoracic Surgery, Department of Surgery, Keck School of Medicine, The University of Southern California, 1510 San Pablo St, Ste 514, Los Angeles, CA 90033. Electronic address: elizabeth.david@med.usc.edu.