title: Upper gastrointestinal bleeding in the critically ill.
authors.forename: R G
authors.initials: RG
authors.lastname: Karlstadt
authors.forename: D
authors.initials: D
authors.lastname: Hedrich
authors.forename: R
authors.initials: R
authors.lastname: Palmer
mesh_terms: D005745:Gastric Acidity Determination; D006471:Gastrointestinal Hemorrhage / Q000517:prevention & control*; D006801:Humans; D007362:Intensive Care Units