KORA Studiengruppe: Quality of care and extent of complications in a population-based sample of patients with type 2 diabetes mellitus. The KORA Survey 2000 - Icks,A.; Rathmann,W.; Haastert,B.; Mielck,A.; Holle,R.; Lowel,H.; Giani,G.; Meisinger,C. (Dtsch Med Wochenschr, 2006)