1. Kirk Kerkorian School of Medicine, University of NV Las Vegas (UNLV), Las Vegas, NV, USA
2. General Surgery, Digestive Disease Institute, Cleveland Clinic Foundation, Cleveland, OH, USA
3. University of AL at Birmingham Heersink School of Medicine, Birmingham, AL, USA
4. Department of Surgery, Kirk Kerkorian School of Medicine at UNLV, Las Vegas, NV, USA