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. J of Skin [Internet]. 2025 Nov. 10 [cited 2026 Apr. 17];9(6):s684. Available from: https://skin.dermsquared.com/skin/article/view/3808