Ros, AM., G. Wennersten, and B. Lagerholm. “Long-Term Photochemotherapy for Psoriasis: A Histopathological and Clinical Follow-up Study With Special Emphasis on Tumour Incidence and Behavior of Pigmented Lesions”. Acta Dermato-Venereologica 63, no. 3 (May 1, 1983): 215–221. Accessed May 26, 2026. https://medicaljournalssweden.se/actadv/article/view/7876.