Skiveren, J, M Haedersdal, PA Philipsen, SR Wiegell, and HC. Wulf. “Morphine Gel 0.3% Does Not Relieve Pain During Topical Photodynamic Therapy: A Randomized, Double-Blind, Placebo-Controlled Study”. Acta Dermato-Venereologica 86, no. 5 (September 7, 2006): 409–411. Accessed November 22, 2024. https://medicaljournalssweden.se/actadv/article/view/8272.