1 Department of Surgery, University of Virginia Health System, Charlottesville, VA, USA.
2 Department of Surgery, Division of Endocrine and Oncologic Surgery, Hospital of the University of Pennsylvania, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA.
3 Department of Biostatistics, Epidemiology, and Informatics, University of Pennsylvania, Philadelphia, PA, USA.
4 Department of Surgery, Duke University School of Medicine, Durham, NC, USA.
5 Department of Pathology, University of Virginia Health System, Charlottesville, VA, USA.
6 Department of Surgery, Division of Endocrine and Oncologic Surgery, Hospital of the University of Pennsylvania, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA. [email protected].