Pediatrics Upper Gastrointestinal Endoscopy Profile in Riau in 2020 and 2021. Archives of Pediatric Gastroenterology, Hepatology, and Nutrition, [S. l.], v. 4, n. 1, p. 1–7, 2025. DOI: 10.58427/apghn.4.1.2025.1-7. Disponível em: https://apghn.com/index.php/journal/article/view/81.. Acesso em: 10 apr. 2025.