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Cadogan, S and Warren-Gash, C (2021). Codelists for: "Anticoagulant prescribing in atrial fibrillation and incident dementia: a UK population-based cohort study". [Data Collection]. London School of Hygiene & Tropical Medicine, London, United Kingdom. https://doi.org/10.17037/DATA.00002326.

Iwagami, M and Tomlinson, LA (2020). Clinical codelist - Smoking status read codes. [Data Collection]. London School of Hygiene & Tropical Medicine, London, United Kingdom. https://doi.org/10.17037/DATA.00001690.

Silverwood, RJ, Mansfield, KE, Mulick, A, Wong, AYS, Schmidt, SAJ, Roberts, A, Smeeth, L, Abuabara, K and Langan, SM (2020). Clinical Codelist - Smoking Read codes. [Data Collection]. London School of Hygiene & Tropical Medicine, London, United Kingdom. https://doi.org/10.17037/DATA.00001985.