
Philippines
Dr. Marie Antoinette De Castro- (MD, MSc, FPCP, FPSG, FPSDE) is a gastroenterologist and Assistant Head of the Institute of Digestive and Liver Diseases at St. Luke's Medical Center – Global City, Philippines, with affiliations at St. Luke's Medical Center – Quezon City and Asian Hospital and Medical Center. She graduated cum laude from the University of Santo Tomas, completed her internal medicine residency (as Chief Resident) and gastroenterology fellowship (as Chief Fellow) at St. Luke's Medical Center, and holds a Master of Science in Clinical Epidemiology from the University of the Philippines Manila. She also received specialized training in esophageal motility testing at Hyogo Medical Center, Japan.
Dr. Lontok serves as Treasurer of the Specialty Board of Gastroenterology of the Philippine Society of Gastroenterology and Associate Editor of the Philippine Journal of Gastroenterology. She has contributed to national clinical practice guidelines on gastric cancer and H. pylori, non-variceal upper GI bleeding, GERD, colon cancer, and hepatitis B, and has served as Associate Professor at the UP Manila College of Public Health.