1. From the Diabetes Clinic, Heart and Diabetes Centre NRW Bad Oeynhausen (MN, AS, BS, TG, TH, MM-R, and DT), and Institute for Laboratory and Transfusion Medicine (CG and KK), Ruhr University Bochum, Germany; Heinrich-Heine University Duesseldorf, Germany (TK); and the Division of Diabetes and Aging, Mount Sinai School of Medicine, New York, NY (JU and HV)