Bayerl, C, B Schwarz, and EG. Jung. “A Three-Year Randomized Trial in Patients With Dysplastic Naevi Treated With Oral Beta-Carotene”. Acta Dermato-Venereologica 83, no. 4 (August 21, 2003): 277–281. Accessed February 24, 2025. https://medicaljournalssweden.se/actadv/article/view/11306.