Drupal-Bibcite31<style face="normal" font="default" size="100%">External validation of ADO, DOSE, COTE and CODEX at predicting death in primary care patients with COPD using standard and machine learning approaches</style><style face="normal" font="default" size="100%">External validation of ADO, DOSE, COTE and CODEX at predicting death in primary care patients with COPD using standard and machine learning approaches</style>