Duff, Christopher J., Solis-Trapala, Ivonne, Driskell, Owen J., Holland, David, Wright, Helen, Waldron, Jenna L., Ford, Clare, Scargill, Jonathan J., Tran, Martin, Hanna, Fahmy W.F., Pemberton, R. John, Heald, Adrian, Fryer, Anthony A., "The frequency of testing for glycated haemoglobin, HbA1c, is linked to the probability of achieving target levels in patients with suboptimally controlled diabetes mellitus.", Clinical Chemistry and Laboratory Medicine, 2018