1. Department of Biostatistics and Bioinformatics, Duke University School of Medicine, Durham, North Carolina, United States
2. Division of Thoracic Surgery, St. Luke's University Health Network, Bethlehem, Pennsylvania, United States
3. Department of Cardiothoracic Surgery, Washington University School of Medicine, St. Louis, Missouri, United States
4. Division of Thoracic Surgery, University of Tennessee Health Science Center, Memphis, Tennessee, United States
5. Division of Thoracic Surgery, Duke University Medical Center, Durham, North Carolina, United States