1. Section of Gastroenterology, Corporal Michael J. Crescenz Medical Center, Pennsylvania, USA
2. Section of Gastroenterology, University of Pennsylvania Perelman School of Medicine, Guardian Drive, PA, USA
3. Department of Internal Medicine, Icahn School of Medicine at Mount Sinai, James J. Peters VA Medical Center, NY, USA
4. Children’s Hospital of Pittsburgh of UPMC, One Children’s Hospital Drive, PA, USA
5. Section of Gastroenterology, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA