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Zilaout H, Houba R, Kromhout H. Temporal trends in respirable dust and respirable quartz concentrations within the European industrial minerals sector over a 15-year period (2002–2016). Occupational and Environmental Medicine 2020; 77:268-275.
In the published version the unit got inadvertently deleted in this sentence:
“Geometric mean respirable quartz concentrations per job per site per campaign varied even more at four orders of magnitude from 0.1 to 1 mg/m3 (figure 2B).”
Correct sentence should be:
“Geometric mean respirable quartz concentrations per job per site per campaign varied even more at four orders of magnitude from 0.1 µg/m3 to 1 mg/m3 (figure 2B).”. The latter is the correct variable that is used in data analysis of this paper.
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