1. Surgical Service of the William S. Middleton Veteran Memorial Hospital, Madison WI, USA
2. Department of Surgery, University of Wisconsin–Madison, Madison, WI, USA
3. Department of Food Science, University of Wisconsin–Madison, Madison, WI, USA
4. Reed Research Group, Department of Animal Sciences, University of Wisconsin–Madison, Madison, WI, USA
5. Department of Surgery, Nanjing University, Jinling Hospital, Nanjing, China