Davidson, J and Warren-Gash, C (2021). Clinical codelist - CPRD Aurum - chronic neurological disease. [Data Collection]. London School of Hygiene & Tropical Medicine, London, United Kingdom. https://doi.org/10.17037/DATA.00002216.

Davidson, J and Warren-Gash, C (2021). Clinical codelist - CPRD GOLD - chronic neurological disease. [Data Collection]. London School of Hygiene & Tropical Medicine, London, United Kingdom. https://doi.org/10.17037/DATA.00002217.

Davidson, J, Warren-Gash, C and Cadogan, S (2021). Clinical codelist - learning disabilities. [Data Collection]. London School of Hygiene & Tropical Medicine, London, United Kingdom. https://doi.org/10.17037/DATA.00002401.

Davidson, J, Warren-Gash, C, Mcdonald, H, Banerjee, A, Smeeth, L, Strongman, H and Cadogan, S (2021). Codelists for: "Ethnic differences in the incidence of clinically diagnosed influenza: an England population-based cohort study 2008-2018". [Data Collection]. London School of Hygiene & Tropical Medicine, London, United Kingdom. https://doi.org/10.17037/DATA.00002102.