1. Pharmaceutical Biochemistry and Bioanalytics, Pharmaceutical Institute, University of Bonn, An der Immenburg 4, D-53121 Bonn, Germany
2. Clemens Schöpf Institute of Organic Chemistry and Biochemistry, Darmstadt University of Technology, Alarich-Weiss-Strasse 4, D-64287 Darmstadt, Germany
3. MALDI Applications and Proteomics R&D, Bruker Daltonics GmbH, Fahrenheitstrasse 4, D-28359 Bremen, Germany
4. Leibniz Institute on Aging − Fritz Lipmann Institute, Beutenbergstrasse 11, D-07745 Jena, Germany
5. Eduard Zintl Institute of Inorganic and Physical Chemistry, Darmstadt University of Technology, Alarich-Weiss-Strasse 4, D-64287 Darmstadt, Germany