Title Item Type No Grouping Chotirmall, SH; Rothnie, K; Müllerová, H; Hurst, JR; Smeeth, L; Davis, K; Thomas, SL and Quint, J (2016). Validation of the Recording of Acute Exacerbations of COPD in UK Primary Care Electronic Healthcare Records. [Dataset]. PLOS One. https://doi.org/10.1371/journal.pone.0151357