Effects of Combined Oral Contraceptive Ethinylestradiol (30 μg) and Dienogest (2 mg) on Carbohydrate Metabolism During 1 Year of Conventional or Extended-Cycle Use - Wiegratz, I.; Stahlberg, S.; Manthey, T.; Sänger, N.; Mittmann, K.; Palombo-Kinne, E.; Mellinger, U.; Lange, E.; Kuhl, H. (Hormone and Metabolic Research, 2010)