Title Item Type No Grouping Schonmann, Y; Mansfield, KE; Smeeth, L; Langan, S and Nitsch, D (2019). Clinical Codelist - Smoking - Read Codes. [Dataset]. London School of Hygiene & Tropical Medicine, London, United Kingdom. 10.17037/DATA.00001222. Mansfield, KE; Schmidt, SAJ; Darvalics, B; Mulick, A; Abuabara, K; Wong, A; Sørensen, HT; Smeeth, L; Bhaskaran, K; Silva, I; Silverwood, R and Langan, S (2019). Clinical Codelist - Smoking - Read Codes. [Dataset]. London School of Hygiene & Tropical Medicine, London, United Kingdom. 10.17037/DATA.00001285.