Comparison of two oral contraceptive forms containing cyproterone acetate and drospirenone in the treatment of patients with polycystic ovary syndrome: A randomized clinical trial - Kahraman, K; Şükür, Y E; Atabekoğlu, C S; Ateş, C; Taşkın, S; Çetinkaya, ŞE; Tolunay, H E; Özmen, B; Sönmezer, M; Berker, B (Arch Gynecol Obstet, 2014)