Acute upper gastrointestinal bleeding due to portal hypertension in children: what is the best timing of endoscopy? - Bello, Fernanda Paixao Silveira; Cardoso, Silvia; Tannuri, Ana Cristina Aoun; Preto-zamperlini, Marcela; Schvartsman, Claudio; Farhat, Sylvia Costa Lima (Digestive and liver disease, 2022)