DOI:
10.1055/s-00000036
Laryngo-Rhino-Otologie
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References
Bae S, Kim MC, Kim JY. et al
Effectiveness of surgical and cotton masks in blocking SARS-CoV-2: a controlled comparison in 4 patients.
Ann Intern Med 2020; M20-1342 doi:10.7326/M20-1342
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