title: Erratum to: Measurement of HbA1c in multicentre diabetes trials - should blood samples be tested locally or sent to a central laboratory: an agreement analysis.
authors.affiliation: Department of Biostatistics, The University of Liverpool, Liverpool, L69 3BX, UK. bna@liverpool.ac.uk.
authors.forename: Barbara N
authors.initials: BN
authors.lastname: Arch
authors.affiliation: Alder Hey Children's NHS FT, East Prescott Road, Liverpool, L12 2AP, UK.
authors.forename: Joanne
authors.initials: J
authors.lastname: Blair
authors.affiliation: Department of Biostatistics, The University of Liverpool, Liverpool, L69 3BX, UK.
authors.forename: Andrew
authors.initials: A
authors.lastname: McKay
authors.affiliation: Professor in Paediatric Endocrinology & Honorary Consultant, Division of Population Medicine, School of Medicine, Cardiff University, Heath Park, Cardiff, CF14 4XN, UK.
authors.forename: John W
authors.initials: JW
authors.lastname: Gregory
authors.affiliation: Department of Biochemistry, Alder Hey Children's NHS FT, East Prescott Road, Liverpool, L122AP, UK.
authors.forename: Paul
authors.initials: P
authors.lastname: Newland
authors.affiliation: Department of Biostatistics, The University of Liverpool, Liverpool, L69 3BX, UK.
authors.forename: Carrol
authors.initials: C
authors.lastname: Gamble