Epidemiological data showed that a significant increase in the risk of severe side-effects could appear at levels as low as 0.5 g·year −1 and became highly significant at levels >1 g·year −1 [ 15 , 28 – 31 ].
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Epidemiological data showed that a significant increase in the risk of severe side-effects could appear at levels as low as 0.5 g·year −1 and became highly significant at levels >1 g·year −1 [ 15 , 28 – 31 ].