From the Department of Anesthesiology and Critical Care, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg (CW, SGS, JL, JS, SS), Freiburg Centre for Interactive Materials and Bioinspired Technology (FIT), University of Freiburg (GU) and University of Freiburg, Freiburg Materials Research Center (FMF), Freiburg, Germany (GU).