What is the fine-grained topic of the following text: Paper reports that ABC-stroke and ABC-bleeding risk scores which comprise clinical variables and CV biomarkers to estimate risk of stroke/systemic embolic events and bleeding, respectively, were well-calibrated and outperformed the CHA2DS2-VASc and HAS-BLED scores, respectively. Only return the topic.
Comparison of ABC-stroke and ABC-bleeding risk scores with CHA2DS2-VASc and HAS-BLED scores in predicting stroke and bleeding events.