Letters |3 March 2020 Thomas Eigentler, MD; Diana Lomberg, MD; Jürgen Machann, PhD; Norbert Stefan, MD Thomas Eigentler, MD University Hospital of Tübingen, Tübingen, Germany (T.E., D.L.) Diana Lomberg, MD University Hospital of Tübingen, Tübingen, Germany (T.E., D.L.) Jürgen Machann, PhD Institute of Diabetes Research and Metabolic Diseases (IDM) of the Helmholtz Center Munich, Tübingen, Germany (J.M.) Norbert Stefan, MD Institute of Diabetes Research and Metabolic Diseases (IDM) of the...