1. Division of Gastroenterology and Hepatology, University of Utah, Salt Lake City, UT 84112, USA
2. Department of Internal Medicine, Hurley Medical Center, Michigan State University, Flint, MI 48503, USA
3. Division of Gastroenterology & Hepatology, CHI Health Creighton University Medical Center, Omaha, NE 68131, USA
4. Health Science Library, Long Island Jewish Medical Center, Northwell Health, New Hyde Park, NY 11040, USA
5. Department of Internal Medicine, Mather Hospital, Northwell Health, Port Jefferson, NY 11777, USA
6. Department of Gastroenterology, Postgraduate Institute of Medical Education and Research, Chandigarh, Sector 12, Chandigarh 160012, India
7. Polistudium SRL, 20135 Milan, Italy
8. Division of Medical Oncology, Fondazione IRCCS Ca’ Granda, Ospedale Maggiore Policlinico, 20122 Milan, Italy
9. Gastroenterology Unit, Department of Surgical and Medical Sciences, University of Foggia, 71122 Foggia, Italy