Quality control in the Scandinavian clinical chemical laboratories.
D055598:Chemical Phenomena; D002621:Chemistry; D002624:Chemistry, Clinical; D004796:Clinical Enzyme Tests / Q000592:standards; D003718:Denmark; D003951:Diagnostic Errors; D005387:Finland; D007391:International Cooperation; D007753:Laboratories / Q000592:standards*; D008722:Methods; D009664:Norway; D011786:Quality Control / Q000592:standards; D013548:Sweden