1. Institute of Organic Chemistry, Department of Chemistry, Universität Hamburg, 20146 Hamburg, Germany
2. Bowel Cancer & Biomarker Lab, Faculty of Medicine and Health, Northern Clinical School, University of Sydney, Sydney, New South Wales 2065, Australia
3. Mass Spectrometric Proteomics, Institute of Clinical Chemistry, University Hospital Hamburg-Eppendorf, 20246 Hamburg, Germany
4. Hamburg School of Food Science, Institute of Food Chemistry, Universität Hamburg, Grindelallee 117, 20146 Hamburg, Germany
5. Institute of Food Technology and Food Chemistry, Technische Universität Berlin, Gustav-Meyer-Allee 25, 13355 Berlin, Germany