Gestational diabetes mellitus (GDM) diagnosis, therapy and follow-up care: Practice Guideline of the German Diabetes Association (DDG) and the German Association for Gynaecology and Obstetrics (DGGG) - Kleinwechter, H; Schäfer-Graf, U; Bührer, C; German Diabetes Association; German Association for Gynaecology and Obstetrics (Exp Clin Endocrinol Diabetes, 2014)