1. Department of Surgery, University of Missouri-Columbia, Columbia, MO, USA
2. Department of Microbiology and Immunology, University of Missouri-Columbia, Columbia, MO, USA
3. Department of Surgery, University of Chicago, IL, USA
4. Ellis Fischel Cancer Center, University of Missouri-Columbia, Columbia, MO, USA
5. Department of Surgery, Medical University of South Carolina, Charleston, SC, USA; Department of Medicine, Medical University of South Carolina, Charleston, SC, USA
6. Department of Microbiology and Immunology, Pennsylvania State University College of Medicine, Hershey, PA, USA