1. Division of Gastrointestinal Surgery, Department of Surgery, University of South Florida Morsani College of Medicine, Tampa, Florida, USA.
2. Department of Internal Medicine, University of Central Florida College of Medicine/HCA Florida Ocala Hospital, Ocala, Florida, USA.
3. Department of Internal Medicine, Wayne State University/Sinai-Grace Hospital - Detroit Medical Center, Detroit, Michigan, USA.
4. University of South Florida Morsani College of Medicine, Tampa, Florida, USA.