Dr. Arnoldo Riquelme, Professor of the Department of Gastroenterology and Head of the Department of Health Sciences, Faculty of Medicine, Pontificia Universidad Católica de Chile. Dr. Riquelme is a clinical researcher, and his areas of expertise include H. pylori infection and its relationship to premalignant lesions and gastric cancer. He is past-President of the Chilean Society of Gastroenterology and current President of the Pan American Organization of Gastroenterology for the period 2021-2023.