Optimized stratification of risk factors in and beyond the CHA2DS2-VASc score to differentiate the real thromboembolic risk in mainland China: a systematic review and meta-analysis - Li, Wenjie; Zeng, Xiaojun; Xu, Lingling; Wang, Tao; Lin, Weiyi; Li, Yuanqing; Luo, Yan; Luo, Bihui (Annals of Palliative Medicine; Vol 9, No 6 (November 30, 2020): Annals of Palliative Medicine, 2020)