Farmer, R, Bhaskaran, K, Eastwood, SV and Mathur, R (2018). Clinical code lists for: "Metformin use and risk of cancer in patients with type 2 diabetes: A cohort study of primary care records using inverse probability weighting of marginal structural models". [Project]. London School of Hygiene & Tropical Medicine, London, United Kingdom. https://doi.org/10.17037/DATA.00000667.