Dr. Kirby is a gastroenterologist who specializes in Nutrition at the Cleveland Clinic in Cleveland, Ohio. He is Board Certified in Internal Medicine, Gastroenterology and Nutrition Support. His practice encompasses from very malnourished patients, who may require enteral or intravenous nutrition, to those with morbid obesity. In addition, he is the Director for the Center for Human Nutrition, the Medical Director for the Intestinal Transplant Program, and a Professor of Medicine.

Samuel Kocoshis, MD, specializes in intestinal rehabilitation as well as the management of complex intestinal and liver disease at Cincinnati Children's Hospital Medical Center. Within the Gastroenterology, Hepatology, and Nutrition Division, Dr. Kocoshis is the medical director of the Small Intestinal Transplantation Program and for many years had led the intestinal rehabilitation service. He is professor of pediatrics at the University of Cincinnati College of Medicine and his research currently focuses upon promotion of intestinal adaptation following massive small intestinal resection as well as biomarkers for acute cellular rejection following intestinal transplantation. Prior to joining Cincinnati Children's, Dr. Kocoshis was chief of Pediatric Gastroenterology and co-director of the Intestinal Care Center at Children's Hospital of Pittsburgh, and professor of pediatrics at the University of Pittsburgh School of Medicine. Dr. Kocoshis earned his bachelor's degree from DePauw University and his medical degree from the Medical College of Wisconsin. He completed an internship in pediatrics at the West Virginia University Medical Center; a residency in pediatrics at Children's Hospital of Pittsburgh; and a clinical fellowship in gastroenterology at Yale University School of Medicine.

Dr. Kocoshis has been an active member of numerous national committees and advisory boards. He has authored and co-authored 175 peer-reviewed articles, review articles and textbook chapters.