1. Department of Internal Medicine I University Hospital Aachen, RWTH Aachen University Aachen Germany
2. Institute of Pathology, University Hospital Aachen RWTH Aachen University Aachen Germany
3. Department of Nephrology and Clinical Immunology RWTH Aachen University Aachen Germany
4. Institute of Experimental Medicine and Systemsbiology, University Hospital Aachen RWTH Aachen University Aachen Germany
5. VIB Metabolomics Expertise Center VIB Center for Cancer Biology Leuven Belgium
6. KU Leuven Metabolomics Expertise Center, Department of Oncology Katholieke Universiteit Leuven Leuven Belgium