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Data Collection
Carreira, H and Funston, G (2019). Therapy Codelist - Opioids. [Data Collection]. London School of Hygiene & Tropical Medicine, London, United Kingdom. https://doi.org/10.17037/DATA.00001424.
Carreira, H and Funston, G (2019). Therapy Codelist - Opioids excluding Codeine. [Data Collection]. London School of Hygiene & Tropical Medicine, London, United Kingdom. https://doi.org/10.17037/DATA.00001425.
Lewer, D, Padmanathan, P, Arfeen, MNU, Denaxas, S, Forbes, H, Gonzalez-Izquierdo, A and Hickman, M (2020). Illicit opioid use. [Data Collection]. HDR UK CALIBER Phenotype Library. https://phenotypes.healthdatagateway.org/phenotypes/PH343/version/686/detail/