Safety and Efficacy of Photodynamic Therapy with Aminolevulinic Acid 10% Topical Gel Activated by Red Light versus Aminolevulinic Acid 20% Topical Solution Activated by Blue Light for the Treatment of Actinic Keratosis on the Upper Extremities: A Blinded Randomized Study. (2025). SKIN The Journal of Cutaneous Medicine, 9(6), s684. https://doi.org/10.25251/9sm0xp66