Free androgen index as a determinant of arterial stiffness in menopause: a mediation analysis - Lambrinoudaki, I; Georgiopoulos, G A; Athanasouli, F; Armeni, E; Rizos, D; Augoulea, A; Chatzidou, S; Koutli, E; Makris, N; Kanakakis, I; Stamatelopoulos, K (Menopause, 2017)