Erratum to: Measurement of HbA1c in multicentre diabetes trials – should blood samples be tested locally or sent to a central laboratory: an agreement analysis
© The Author(s). 2017
Received: 22 March 2017
Accepted: 22 March 2017
Published: 5 April 2017
The original article was published in Trials 2016 17:517
The original publication  is missing one reference in the reference list. This reference should be also cited within the text. This error was caused during typesetting. The publisher apologizes to the readers for the inconvenience caused. The correct reference and citation can be found here:
13. Martin Bland J, Altman D. Statistical methods for assessing agreement between two methods of clinical measurement. The Lancet. 1986. 327(8476):307-10. doi:https://doi.org/10.1016/S0140-6736(86)90837-8.
The Bland-Altman  analysis of agreement method was used to compare local and central measurements.
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- Arch BN, Blair J, McKay A, Gregory JW, Newland P, Gamble C. Measurement of HbA1c in multicentre diabetes trials – should blood samples be tested locally or sent to a central laboratory: an agreement analysis. Trials. 2016;17:517. doi:https://doi.org/10.1186/s13063-016-1640-6.View ArticlePubMedPubMed CentralGoogle Scholar