New approach for a reliable in vitro sun protection factor method Part I: Principle and mathematical aspects
Development of an international harmonized in vitro method for sun protection factor (SPF) assessment is currently in progress because of the lack of both reproducibility and accuracy in the current methodology. The aim of this article was to focus on the principle and mathematical aspects (Part I) of a new approach for a reproducible and correlated in vitro test method to obtain results similar to the in vivo SPF for labelling purposes.
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