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. Author manuscript; available in PMC: 2016 Feb 22.
Published in final edited form as: Clin Chim Acta. 2013 Jan 11;418:63–71. doi: 10.1016/j.cca.2012.12.026

Figure 1.

Figure 1

Mean HbA1c measured by the CPRL for one very long term QC specimen and six additional QC specimens measured for shorter periods. Each point represents the mean of 34–653 measurements during each year of use. For each point the CV was <3%.