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APA Citation
Mei, J., Hu, W., Chen, Q., Li, C., Chen, Z., Fan, Y., Tian, S., Zhang, Z., Li, B., Ye, Q., Yue, J., & Wang, Q. (2020). development and external validation of a COVID-19 mortality risk prediction algorithm: a multicentre retrospective cohort study. BMJ open, 10(12), . http://access.bl.uk/ark:/81055/vdc_100127575583.0x000055