Their well-controlled study showed that blue PE fibres in the surrounding air were increased on average from 7.6 to 56 per cubic metre of air, a highly significant increase in spite of the high standard deviations.
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Their well-controlled study showed that blue PE fibres in the surrounding air were increased on average from 7.6 to 56 per cubic metre of air, a highly significant increase in spite of the high standard deviations.