title: External quality assurance model for improvement of specificity and accuracy of serum hormone determinations in the Nordic countries.
authors.affiliation: Department of Clinical Chemistry, Oulun Yliopisto, Finland.
authors.forename: A
authors.initials: A
authors.lastname: Ruokonen
authors.forename: P
authors.initials: P
authors.lastname: Hyltoft-Petersen
authors.forename: O
authors.initials: O
authors.lastname: Blaabjerg
mesh_terms: D002624:Chemistry, Clinical / Q000592:standards; D006728:Hormones / Q000097:blood*; D006801:Humans; D011786:Quality Control; D015203:Reproducibility of Results; D012537:Scandinavian and Nordic Countries; D012680:Sensitivity and Specificity
chemical_list: D006728:Hormones