Figure 2From: Stratum corneum lipids liposomes for the topical delivery of 5-aminolevulinic acid in photodynamic therapy of skin cancer: preparation and in vitro permeation studyAmount of 5-ALA permeated (μg/cm2) through hairless mouse skin from the 5-ALA aqueous solution (black star) and SCLLs (square), as a function of time (hours).Back to article page