Drupal-Bibcite0<style face="normal" font="default" size="100%">Risk of atrial fibrillation and association with other diseases: protocol of the derivation and international external validation of a prediction model using nationwide population-based electronic health records</style><style face="normal" font="default" size="100%">Risk of atrial fibrillation and association with other diseases: protocol of the derivation and international external validation of a prediction model using nationwide population-based electronic health records</style>