Bhaskaran, K (2019). Covariate Code List - Smoking status. [Data Collection]. London School of Hygiene & Tropical Medicine, London, United Kingdom. https://doi.org/10.17037/DATA.00001120.

Forbes, H and Bhaskaran, K (2018). Clinical code list - Smoking use. [Data Collection]. London School of Hygiene & Tropical Medicine, London, United Kingdom. https://doi.org/10.17037/DATA.00000990.

Forbes, H, Bhaskaran, K, Thomas, SL, Smeeth, L, Clayton, T and Langan, S (2014). Clinical code list - smoking codes. [Data Collection]. London School of Hygiene & Tropical Medicine, London, United Kingdom. https://doi.org/10.17037/DATA.167.

Forbes, H and Langan, S (2018). Clinical codelist - Smoking codes. [Data Collection]. London School of Hygiene & Tropical Medicine, London, United Kingdom. https://doi.org/10.17037/DATA.00000836.

Greenhall, G, Mansfield, KE, Nitsch, D, Iwagami, M, Leyrat, C, Johnston, R, Smeeth, L and Tomlinson, LA (2019). Clinical codelist - Smoking status. [Data Collection]. London School of Hygiene & Tropical Medicine, London, United Kingdom.

Jóhannesdóttir Schmidt, SA and Langan, S (2019). Clinical Code List - Smoking Use - ICD-10 Codes. [Data Collection]. London School of Hygiene & Tropical Medicine, London, United Kingdom. https://doi.org/10.17037/DATA.00001328.

Jóhannesdóttir Schmidt, SA and Langan, S (2019). Clinical Code List - Smoking Use - Read Codes. [Data Collection]. London School of Hygiene & Tropical Medicine, London, United Kingdom. https://doi.org/10.17037/DATA.00001258.

Jóhannesdóttir Schmidt, SA and Langan, S (2019). Clinical Code List - Smoking Use - Read Codes. [Data Collection]. London School of Hygiene & Tropical Medicine, London, United Kingdom. https://doi.org/10.17037/DATA.00001327.

Jóhannesdóttir Schmidt, SA and Langan, S (2019). Therapy Code List - Nicotine Replacement Therapy - BNF Codes. [Data Collection]. London School of Hygiene & Tropical Medicine, London, United Kingdom. https://doi.org/10.17037/DATA.00001256.

Jóhannesdóttir Schmidt, SA and Langan, S (2019). Therapy Code List - Nicotine Replacement Therapy - BNF Codes. [Data Collection]. London School of Hygiene & Tropical Medicine, London, United Kingdom. https://doi.org/10.17037/DATA.00001326.

Matthews, A and Bhaskaran, K (2017). Clinical code list - Smoking. [Data Collection]. London School of Hygiene & Tropical Medicine, London, United Kingdom. https://doi.org/10.17037/DATA.196.

Matthews, A, Langan, S, Douglas, IJ, Smeeth, L and Bhaskaran, K (2016). Clinical code list - Smoking codes. [Data Collection]. London School of Hygiene & Tropical Medicine, London, United Kingdom. https://doi.org/10.17037/DATA.168.

Schonmann, Y, Mansfield, KE, Hayes, J, Roberts, A, Smeeth, L and Langan, S (2018). Diagnoses code list - Smoking Read codes. [Data Collection]. London School of Hygiene & Tropical Medicine, London, United Kingdom. https://doi.org/10.17037/DATA.00000937.

Schonmann, Y, Mansfield, KE, Smeeth, L, Langan, S and Nitsch, D (2019). Clinical Codelist - Smoking - Read Codes. [Data Collection]. London School of Hygiene & Tropical Medicine, London, United Kingdom. https://doi.org/10.17037/DATA.00001222.

Sigrún Alba, JS and Langan, S (2019). Clinical Code List - Smoking Use - ICD-10 Codes. [Data Collection]. London School of Hygiene & Tropical Medicine, London, United Kingdom. https://doi.org/10.17037/DATA.00001259.