Evidence for an altered sex ratio in clinic-referred adolescents with gender dysphoria. - Aitken M; Steensma TD; Blanchard R; VanderLaan DP; Wood H; Fuentes A; Spegg C; Wasserman L; Ames M; Fitzsimmons CL; Leef JH; Lishak V; et al. (The journal of sexual medicine, 2015)