1 University of Alabama at Birmingham Department of Surgery, USA; Professor and Director of GI Surgery Department of Surgery University of Alabama at Birmingham, KB 428, 1720 2nd Ave S, Birmingham, AL, 35294, USA. Electronic address: gkennedy@uabmc.edu.
2 University of Colorado Department of Surgery, USA; Assistant Professor of Surgery Department of Surgery University of Colorado, 12631 E. 17 th Avenue C-313Aurora, CO, 80045, USA. Electronic address: sarah.tevis@cuanschutz.edu.