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Background
Aminolevulinic acid photodynamic therapy (ALA‐PDT) is an effective treatment for multiple actinic keratosis (AK). However, PDT‐induced pain often discontinues the therapy to reduce its efficacy, limiting its application. If modified painless PDT schedule with shorter photosensitizer dressing and higher dose illumination could achieve good efficacy in AK, it is still unknown.
Objectives...
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