Reinhold, U, T Dirschka, R Ostendorf, R Aschoff, C Berking, W Philipp-Dormston, and R.M. Szeimies. 2019. “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”. SKIN The Journal of Cutaneous Medicine 3 (November):S49. https://doi.org/10.25251/skin.3.supp.49.