Dirschka, T., U. Reinhold, M. Foguet, B. Novak, B. Schmitz, H. Luebbert, and R. M. Szeimies. “Photodynamic Therapy for Actinic Keratosis and Field Cancerization Using BF-200 ALA: Results of Pivotal Phase III Trials and Follow-Up”. SKIN The Journal of Cutaneous Medicine, vol. 1, no. 3.1, Oct. 2017, p. s117, doi:10.25251/skin.1.supp.116.