Follow-up results of a randomized, double-blind, phase III, multi-center study to evaluate the safety and efficacy of BF-200 ALA versus placebo in field-directed treatment of mild to moderate AK with photodynamic therapy when using narrowband red light. J of Skin [Internet]. 2019 Nov. 9 [cited 2026 Apr. 21];3:S49. Available from: https://skin.dermsquared.com/skin/article/view/777