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APA Citation
Chen, Y., Zhang, Q., Peng, W., Liu, D., You, Y., Liu, X., Tang, S., & Zhang, T. (2020). efficacy and safety of mesenchymal stem cells for the treatment of patients infected with COVID-19: a systematic review and meta-analysis protocol. BMJ open, 10(12), . http://access.bl.uk/ark:/81055/vdc_100127559076.0x000055