title: [Epidemiology in orthopedic surgery--registry data are often deficient].
authors.forename: C
authors.initials: C
authors.lastname: Zetterberg
mesh_terms: D004812:Epidemiologic Methods; D009985:Orthopedics; D012042:Registries
vernacular_title: Epidemiologi inom ortopedisk kirurgi--registerdata ofta bristfälliga.