title: The quality of a registry based study depends on the quality of the data - without validation, it is questionable.
authors.affiliation: University of Helsinki and Helsinki University Hospital, Department of Vascular Surgery, Helsinki, Finland. Electronic address: maarit.venermo@hus.fi.
authors.forename: M
authors.initials: M
authors.lastname: Venermo
authors.affiliation: Uppsala University, Department of Surgical Sciences, Section of Vascular Surgery, Uppsala, Sweden.
authors.forename: K
authors.initials: K
authors.lastname: Mani
authors.affiliation: Cardiovascular Surgery Department, University Hospital (CHU, ULg) of Liège, Belgium.
authors.forename: P
authors.initials: P
authors.lastname: Kolh
mesh_terms: D006801:Humans; D012042:Registries