F

Forbes, H, Bhaskaran, K, Thomas, SL, Smeeth, L, Clayton, T and Langan, S (2014). Clinical code list - COPD codes. [Data Collection]. London School of Hygiene & Tropical Medicine, London, United Kingdom. https://doi.org/10.17037/DATA.165.

Forbes, H and Strongman, H (2019). Covariate Code List - COPD. [Data Collection]. London School of Hygiene & Tropical Medicine, London, United Kingdom. https://doi.org/10.17037/DATA.00001134.

I

Iwagami, M, Caplin, B, Smeeth, L, Tomlinson, LA and Nitsch, D (2018). Clinical Codelist - Read codes for COPD. [Data Collection]. London School of Hygiene & Tropical Medicine, London, United Kingdom. https://doi.org/10.17037/DATA.00000859.

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Quint, J (2020). Clinical codelist - Cough (used to help detect COPD exacerbations). [Data Collection]. London School of Hygiene & Tropical Medicine, London, United Kingdom. https://doi.org/10.17037/DATA.00001649.

Quint, JK (2020). Clinical codelist - Sputum (used to help detect COPD exacerbations). [Data Collection]. London School of Hygiene & Tropical Medicine, London, United Kingdom. https://doi.org/10.17037/DATA.00001650.