title: Risk of portal obstruction in newborns.
authors.forename: Fernando
authors.initials: F
authors.lastname: Alvarez
mesh_terms: D002404:Catheterization / Q000009:adverse effects*; D006471:Gastrointestinal Hemorrhage / Q000209:etiology; D006801:Humans; D007231:Infant, Newborn; D011169:Portal Vein; D012307:Risk Factors; D014463:Ultrasonography; D014471:Umbilical Veins; D020246:Venous Thrombosis / Q000000981:diagnostic imaging / Q000453:epidemiology / Q000209:etiology*