van der Willigen, A., Peereboom-Wynia JD, van Joost, T. and Stolz, E. 1987. A preliminary study of the effect of 11a-hydroxyprogesterone on the hair growth in men suffering from androgenetic alopecia. Acta Dermato-Venereologica. 67, 1 (Jan. 1987), 82–85. DOI:https://doi.org/10.2340/00015555678285.