Walker, J, Grint, D, Strongman, H, Eggo, RM, Peppa, M, Minassian, C, Mansfield, KE, Rentsch, C, Douglas, IJ, Mathur, R, Wong, A, Quint, JK, Andrews, N, Lopez-bernal, J, Scott, A, Ramsay, M, Smeeth, L and McDonald, H (2020). UK prevalence of risk factors for severe COVID-19 disease, by age and region: point prevalence estimates in 2019 and 2014, using electronic health records. [Data Collection]. London School of Hygiene & Tropical Medicine, London, United Kingdom. https://doi.org/10.17037/DATA.00001833.

Peppa, M, Thomas, S, Kempley, S and Mangtani, P (2020). Codelists for: "Identifying major congenital malformations in anonymised UK electronic health records: the value of primary care, hospital admissions and mortality data". [Project]. London School of Hygiene & Tropical Medicine, London, United Kingdom. https://doi.org/10.17037/DATA.00001630.

Peppa, M, Thomas, S, Kempley, S, Mangtani, P and Walker, J (2020). Codelists for: "Seasonal influenza vaccination during pregnancy and the risk of major congenital malformations in live-born infants: A 2010-2016 historical cohort study". [Project]. London School of Hygiene & Tropical Medicine, London, United Kingdom. https://doi.org/10.17037/DATA.00001629.

Peppa, M, Thomas, S, Kempley, S and Mangtani, P (2020). Clinical codelist - Congenital malformation codes. [Data Collection]. London School of Hygiene & Tropical Medicine, London, United Kingdom. https://doi.org/10.17037/DATA.00001623.

Thomas, S, Peppa, M and Walker, J (2020). Clinical codelist - Influenza vaccination codes. [Data Collection]. London School of Hygiene & Tropical Medicine, London, United Kingdom. https://doi.org/10.17037/DATA.00001626.

Peppa, M, Thomas, S, Kempley, S and Mangtani, P (2020). HES diagnosis codelist - Congenital malformation codes. [Data Collection]. London School of Hygiene & Tropical Medicine, London, United Kingdom. https://doi.org/10.17037/DATA.00001624.

Peppa, M, Thomas, S, Kempley, S and Mangtani, P (2020). HES procedures codelist - Congenital malformation codes. [Data Collection]. London School of Hygiene & Tropical Medicine, London, United Kingdom. https://doi.org/10.17037/DATA.00001625.

Thomas, S, Peppa, M and Walker, J (2020). Immunisation codelist - Influenza vaccination codes. [Data Collection]. London School of Hygiene & Tropical Medicine, London, United Kingdom. https://doi.org/10.17037/DATA.00001627.

Thomas, S, Peppa, M and Walker, J (2020). Therapy codelist - Influenza vaccination codes. [Data Collection]. London School of Hygiene & Tropical Medicine, London, United Kingdom. https://doi.org/10.17037/DATA.00001628.