Barabash-Neila, Román, Lourdes Rodríguez-Fernández Freire, Teresa Zulueta-Dorado, and Julián Conejo-Mir. “Thickening of the Skin on the Forehead: A Quiz”. Acta Dermato-Venereologica 91, no. 1 (June 20, 2010): 108–111. Accessed June 21, 2026. https://medicaljournalssweden.se/actadv/article/view/9008.