The effect of finasteride a 5α-reductase inhibitor, on scalp skin testosterone and dihydrotestosterone concentration in patients with male pattern baldness. - Dallob,AL.; Sadick,NS.; Unger,W.; Lipert,S.; Geissler,LA.; Gregoire,SL.; Nguyen,HH.; Moore,EC.; Tanaka,WK. (J Clin Endocrinol Metab, 1994)