A, Björnberg, and Hellgren L. “Pityriasis Rosea. A Statistical, Clinical, and Laboratory Investigation of 826 Patients and Matched Healthy Controls”. Acta Dermato-Venereologica 42, no. 50 (March 31, 2020): 1–68. Accessed April 30, 2026. https://medicaljournalssweden.se/actadv/article/view/2712.