Certificate of analysis NFKK Reference Serum X: a reprint

This is a reprint of the first official version of the certificate of analysis for NFKK Reference Serum X. It should be noted that the content of the certificate might be subject to changes in the future and one always must use a valid certificate. The official version of the certificate at all times is available at the homepage of the Nordic Reference Interval Project, NORIP at www.furst.no/norip. Further information is also available in articles elsewhere in this issue and at the NORIP homepage. agreed on by EQAnord, the liaison organization for the Nordic EQA organizers. The Scandinavian Society of Clinical Chemistry ( NFKK) and EQAnord previously decided on a common strategy: a coordinated implementation of the reference intervals, where information of the benefits was central. In Norway, the information has resulted in smooth implementation of the new reference intervals for enzymes and a marked decrease in deviation of measurement results.