Zusammenfassung
Photodynamic therapy (PDT) is increasingly used for treatment of actinic keratoses (AKs) but is a cumbersome procedure. A thin self-adhesive patch (PD P 506 A) containing 5-aminolaevulinic acid (5-ALA) was developed to facilitate PDT. To investigate efficacy and safety of the patch in comparison with placebo-PDT (superiority design, observer-blinded; study AK 03) and standard therapy, cryosurgery ...

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