title: Letter: risk factor and mortality of peptic ulcer disease - authors' reply.
authors.affiliation: Gastrointestinal Surgery, University of Helsinki, Helsinki University Hospital, Helsinki, Finland. hanna.malmi@helsinki.fi.
authors.forename: H
authors.initials: H
authors.lastname: Malmi
authors.affiliation: Unit of Primary Health Care, Helsinki University, Helsinki University Hospital, Helsinki, Finland.|Primary Health Care Unit, Department of General Practice, Kuopio University, Kuopio, Finland.
authors.forename: H
authors.initials: H
authors.lastname: Kautiainen
authors.affiliation: Research Department, The Social Insurance Institution of Finland, Turku, Finland.
authors.forename: L J
authors.initials: LJ
authors.lastname: Virta
authors.affiliation: Helsinki University Clinic of Gastroenterology, University of Helsinki, Helsinki, Finland.
authors.forename: M A
authors.initials: MA
authors.lastname: Färkkilä
mesh_terms: D006801:Humans; D010437:Peptic Ulcer; D010438:Peptic Ulcer Hemorrhage; D012307:Risk Factors