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Schmidt, SAJ and Langan, S (2019). Clinical Code List - Charlson Comorbidity - ICD-10 Codes. [Data Collection]. London School of Hygiene & Tropical Medicine, London, United Kingdom. https://doi.org/10.17037/DATA.00001322.

Schmidt, SAJ and Langan, S (2019). Clinical Code List - Charlson Comorbidity - ICD-10 Codes. [Data Collection]. London School of Hygiene & Tropical Medicine, London, United Kingdom. https://doi.org/10.17037/DATA.00001233.

Schmidt, SAJ and Langan, S (2019). Clinical Code List - Charlson Comorbidity - OPCS Codes. [Data Collection]. London School of Hygiene & Tropical Medicine, London, United Kingdom. https://doi.org/10.17037/DATA.00001323.

Schmidt, SAJ and Langan, S (2019). Clinical Code List - Charlson Comorbidity - OPCS Codes. [Data Collection]. London School of Hygiene & Tropical Medicine, London, United Kingdom. https://doi.org/10.17037/DATA.00001234.

Schmidt, SAJ and Langan, S (2019). Clinical Code List - Charlson Comorbidity - Read Codes. [Data Collection]. London School of Hygiene & Tropical Medicine, London, United Kingdom. https://doi.org/10.17037/DATA.00001321.

Schmidt, SAJ and Langan, S (2019). Clinical Code List - Charlson Comorbidity - Read Codes. [Data Collection]. London School of Hygiene & Tropical Medicine, London, United Kingdom. https://doi.org/10.17037/DATA.00001232.

Schmidt, SAJ and Langan, S (2018). Clinical code list - Charlson Comorbidity codes. [Data Collection]. London School of Hygiene & Tropical Medicine, London, United Kingdom. https://doi.org/10.17037/DATA.00000985.

Schmidt, SAJ and Langan, S (2018). Clinical code list - OPCS Charlson Comorbidity codes. [Data Collection]. London School of Hygiene & Tropical Medicine, London, United Kingdom. https://doi.org/10.17037/DATA.00000987.

Schmidt, SAJ and Langan, S (2018). ICD-10 codes - Charlson Comorbidity. [Data Collection]. London School of Hygiene & Tropical Medicine, London, United Kingdom. https://doi.org/10.17037/DATA.00000986.