The degree of external genitalia virilization in girls with 21-hydroxylase deficiency appears to be influenced by the CAG repeats in the androgen receptor gene - Rocha, R O; Billerbeck, A E; Pinto, E M; Melo, K F; Lin, C J; Longui, C A; Mendonca, B B; Bachega, T A (Clin Endocrinol (Oxf), 2008)