Face masks for the public during the covid-19 crisis
@article{Greenhalgh2020FaceMF, title={Face masks for the public during the covid-19 crisis}, author={Trisha Greenhalgh and Manuel B Schmid and Thomas Czypionka and Dirk Bassler and Laurence Gruer}, journal={BMJ}, year={2020}, volume={369} }
Trisha Greenhalgh and colleagues argue that it is time to apply the precautionary principleĀ
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