Correction: Higher HbA1c Measurement Quality Standards are Needed for Follow-Up and Diagnosis: Experience and Analyses from Germany - Heinemann, Lutz; Kaiser, Patricia; Freckmann, Guido; Grote-Koska, Denis; Kerner, Wolfgang; Landgraf, Rüdiger; Merker, Ludwig; Müller, Ulrich A.; Müller-Wieland, Dirk; Roth, Johannes; Spannagl, Michael; Wallaschofski, Henri; Nauck, Matthias (Hormone and Metabolic Research, 2018)