In vitro percutaneous absorption and in
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Shing-Chuan Shen; Woan-Ruoh Lee; Yi-Ping Fang; Chung-Hong Hu; Jia-You Fang
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Article
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2006
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John Wiley and Sons
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English
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5-Aminolevulinic acid (ALA) is used as a precursor of protoporphyrin IX (PpIX) for photodynamic therapy (PDT) of superficial skin cancers and subcutaneous metastases of internal malignancies. The permeability of ALA across intact skin is always low, making it difficult to achieve the desired therape