1 Division of Gastrointestinal Surgery, Department of Surgery, University of Alabama at Birmingham, 1720 2(nd) Avenue South, KB427, Birmingham, AL, 35294, USA.
2 Department of Healthcare Administration, Idaho State University, 921 South 8th Avenue STOP 8020, Pocatello, Idaho, 83209-8109, USA.
3 Division of Gastrointestinal Surgery, Department of Surgery, University of Alabama at Birmingham, 1720 2(nd) Avenue South, KB427, Birmingham, AL, 35294, USA. Electronic address: dchu@uabmc.edu.