![Titanium dioxide particles frequently present in face masks intended for general use require regulatory control | Scientific Reports Titanium dioxide particles frequently present in face masks intended for general use require regulatory control | Scientific Reports](https://media.springernature.com/full/springer-static/image/art%3A10.1038%2Fs41598-022-06605-w/MediaObjects/41598_2022_6605_Fig1_HTML.jpg)
Titanium dioxide particles frequently present in face masks intended for general use require regulatory control | Scientific Reports
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