e-Letters: Observations Elric Zweck1,2,3, Daniel Scheiber1,2,3, Tomas Jelenik1,2, Florian Bönner3, Patrick Horn3, Dominik Pesta1,2, Heinz-Peter Schultheiss4, Udo Boeken5, Payam Akhyari5, Artur Lichtenberg5,6, Malte Kelm3,6, Michael Roden1,2,6,7, Ralf Westenfeld3 and Julia Szendroedi1,2,7⇑ 1Institute for Clinical Diabetology, German Diabetes Center, Leibniz Center for Diabetes Research, Heinrich-Heine University, Düsseldorf, Germany 2German Center for Diabetes Research (DZD e.V.),...