Title Item Type No Grouping Iwagami, M, Caplin, B, Smeeth, L, Tomlinson, LA and Nitsch, D (2018). Clinical Codelist - Read codes for Hypertension. [Dataset]. London School of Hygiene & Tropical Medicine, London, United Kingdom. 10.17037/DATA.00000866. Herrett, E, Cook, S, Mansfield, KE, Crellin, E, Smeeth, L, Quint, JK and Denholm, R (2019). Clinical Codelist - Read codes for Hypertension. [Dataset]. London School of Hygiene & Tropical Medicine, London, United Kingdom. 10.17037/DATA.00001082.