Neittaanmäki-Perttu, N., Grönroos, M., Karppinen, T., Snellman, E., & Rissanen, P. (2015). Photodynamic Therapy for Actinic Keratoses: A Randomized Prospective Non-sponsored Cost-effectiveness Study of Daylight-mediated Treatment Compared with Light-emitting Diode Treatment. Acta Dermato-Venereologica, 96(2), 241–244. https://doi.org/10.2340/00015555-2205