Davidson, J, Warren-Gash, C and Mcdonald, H (2021). Clinical codelist - CPRD Aurum - chronic respiratory disease. [Data Collection]. London School of Hygiene & Tropical Medicine, London, United Kingdom. https://doi.org/10.17037/DATA.00002214.

Davidson, J, Warren-Gash, C and Mcdonald, H (2021). Clinical codelist - CPRD GOLD - chronic respiratory disease. [Data Collection]. London School of Hygiene & Tropical Medicine, London, United Kingdom. https://doi.org/10.17037/DATA.00002215.

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.

Davidson, J, Warren-Gash, C, Mcdonald, H, Gayle, A, Evans, D and Clay, S (2021). Clinical codelist - Chronic respiratory disease other than asthma. [Data Collection]. London School of Hygiene & Tropical Medicine, London, United Kingdom. https://doi.org/10.17037/DATA.00002398.