Erratum to: Measurement of HbA1c in multicentre diabetes trials - should blood samples be tested locally or sent to a central laboratory: an agreement analysis
3 Department of Biostatistics, The University of Liverpool, Liverpool, L69 3BX, UK.
4 Professor in Paediatric Endocrinology & Honorary Consultant, Division of Population Medicine, School of Medicine, Cardiff University, Heath Park, Cardiff, CF14 4XN, UK.
5 Department of Biochemistry, Alder Hey Children's NHS FT, East Prescott Road, Liverpool, L122AP, UK.