1. EP09-A3 Measurement Procedure Comparison and Bias Estimation Using Patient Samples; Approved Guideline. 3rd ed. PA, USA: Clinical and Laboratory Standards Institute; 2013.
2. A method to estimate the uncertainty of measurements in a conglomerate of instruments/laboratories
3. JCGM. Evaluation of measurement data â€' guide to the expression of uncertainty in measurement, 2008. www.bipm.org/utils/common/documents/jcgm/ JCGM_100_2008_E.pdf.
4. Westgard JO, Carey RN, Wold S. Criteria for judging precision and accuracy in method development and evaluation. Clin Chem. 1974;20(7):825-833.
5. Richtlinie der Bundesärztekammer zur Qualitätssicherung laboratoriumsmedizinischer Untersuchungen. Bundesärztekammer, Berlin, Germany; 2013.