title: Letter: Scoring systems for upper gastrointestinal bleeding--authors' reply.
authors.forename: D W
authors.initials: DW
authors.lastname: Cheng
authors.forename: Y W
authors.initials: YW
authors.lastname: Lu
authors.forename: T
authors.initials: T
authors.lastname: Teller
authors.forename: H K
authors.initials: HK
authors.lastname: Sekhon
authors.forename: B U
authors.initials: BU
authors.lastname: Wu
mesh_terms: D005260:Female; D006471:Gastrointestinal Hemorrhage / Q000175:diagnosis*; D006801:Humans; D008297:Male; D012720:Severity of Illness Index