Arai, A, J von Hintzenstern, F Kiesewetter, H Schell, and O P Hornstein. “In Vitro Effects of Testosterone, Dihydrotestosterone and Estradiol on Cell Growth of Human Hair Bulb Papilla Cells and Hair Root Sheath Fibroblasts”. Acta Dermato-Venereologica 70, no. 4 (July 1, 1990): 338–341. Accessed June 18, 2026. https://medicaljournalssweden.se/actadv/article/view/17059.