The authors wish to inform the readers of a needed clarification in this article:

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  In the last sentence of the discussion on page 738 there is a small typo: “degradation of BisGMA”; it should instead read “degradation of BisDMA ”.

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  Fig. 3 on page 736 and Fig. 4 on page 737: The release in Y -axis is mistakenly represented as μmol/mm ² and μmol/mm ³ , respectively. This should be nmol/mm ² and nmol/mm ³ , respectively.

The authors would like to apologize for any inconvenience caused.