Silverwood, RJ, Mansfield, KE, Mulick, A, Wong, AYS, Schmidt, SAJ, Roberts, A, Smeeth, L, Abuabara, K and Langan, SM (2020). Clinical Codelist - Asthma diagnostic Read codes. [Data Collection]. London School of Hygiene & Tropical Medicine, London, United Kingdom. https://doi.org/10.17037/DATA.00001978.