1. Department of Surgery, Duke University Medical Center, Durham, North Carolina, USA;
2. Department of Bioinformatics and Biostatistics, Duke University School of Medicine, Durham, North Carolina, USA;
3. Department of Pathology, Duke University Medical Center, Durham, North Carolina, USA;
4. Department of Immunology, Duke University Medical Center, Durham, North Carolina, USA;
5. Department of Applied Ecology, NC State University, Raleigh, North Carolina, USA