title: Reference materials and reference measurement systems in laboratory medicine. Networks of Reference Laboratories.
authors.affiliation: Institut für Klinische Biochemie, Universität Bonn, Germany.
authors.forename: L
authors.initials: L
authors.lastname: Siekmann
authors.forename: B T
authors.initials: BT
authors.lastname: Doumas
authors.forename: L
authors.initials: L
authors.lastname: Thienpont
authors.forename: G
authors.initials: G
authors.lastname: Schumann
mesh_terms: D002138:Calibration; D002624:Chemistry, Clinical / Q000592:standards*; D019058:Community Networks; D006801:Humans; D007373:Interinstitutional Relations; D007391:International Cooperation; D007753:Laboratories / Q000592:standards*; D012015:Reference Standards; D015203:Reproducibility of Results; D014944:World Health Organization