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Davidson, J and Strongman, H (2022). Clinical codelist - CPRD Aurum - rheumatoid arthritis. [Data Collection]. London School of Hygiene & Tropical Medicine, London, United Kingdom. https://doi.org/10.17037/DATA.00002823.

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Iwagami, M, Caplin, B, Smeeth, L, Tomlinson, LA and Nitsch, D (2018). Clinical Codelist - Read codes for Rheumatoid Arthritis. [Data Collection]. London School of Hygiene & Tropical Medicine, London, United Kingdom. https://doi.org/10.17037/DATA.00000871.

Iwagami, M and Tomlinson, LA (2020). Clinical codelist - Rheumatoid arthritis codes. [Data Collection]. London School of Hygiene & Tropical Medicine, London, United Kingdom. https://doi.org/10.17037/DATA.00001678.

Iwagami, M, Tomlinson, LA, Mansfield, KE, Douglas, IJ, Smeeth, L and Nitsch, D (2018). Clinical codelist - Rheumatoid Arthritis read codes. [Data Collection]. London School of Hygiene & Tropical Medicine, London, United Kingdom. https://doi.org/10.17037/DATA.00000884.

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Matthews, A and Strongman, H (2019). Covariate Code List - Rheumatoid arthritis. [Data Collection]. London School of Hygiene & Tropical Medicine, London, United Kingdom. https://doi.org/10.17037/DATA.00001131.

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Muzambi, R (2021). Clinical codelist - Rhematoid Arthritis ICD-10 codes. [Data Collection]. London School of Hygiene & Tropical Medicine, London, United Kingdom. https://doi.org/10.17037/DATA.00002607.

Muzambi, R (2021). Clinical codelist - Rheumatoid Arthritis Read codes. [Data Collection]. London School of Hygiene & Tropical Medicine, London, United Kingdom. https://doi.org/10.17037/DATA.00002606.

Muzambi, R (2020). Clinical codelist - Rheumatoid Arthritis read codes. [Data Collection]. London School of Hygiene & Tropical Medicine, London, United Kingdom. https://doi.org/10.17037/DATA.00002059.

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Strongman, H, Mansfield, K and LSHTM Electronic Health Records team (2021). Clinical codelist - Rheumatoid Arthritis. [Data Collection]. London School of Hygiene & Tropical Medicine, London, United Kingdom. https://doi.org/10.17037/DATA.00002399.