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Wilkinson, S, Douglas, IJ, Williamson, E, Stirnadel-Farrant, H, Fogarty, D, Pokrajac, A, Smeeth, L and Tomlinson, LA (2018). Code lists for: Intensification of treatment of type 2 diabetes mellitus after metformin monotherapy in UK primary care. [Data Collection]. London School of Hygiene & Tropical Medicine, London, United Kingdom. https://doi.org/10.17037/DATA.286.