About the Authors

Kristina Funk

Affiliation University of Duisburg-Essen, Institute of Physiological Chemistry, University Hospital Essen, Essen, Germany

Nina Scheerer

Affiliation University of Duisburg-Essen, Institute of Physiology, University Hospital Essen, Essen, Germany

Rabea Verhaegh

Affiliation University of Duisburg-Essen, Institute of Physiological Chemistry, University Hospital Essen, Essen, Germany

Carolin Pütter

Affiliation University of Duisburg-Essen, Institute for Medical Informatics, Biometry and Epidemiology, University Hospital Essen, Essen, Germany

Joachim Fandrey

Affiliation University of Duisburg-Essen, Institute of Physiology, University Hospital Essen, Essen, Germany

Herbert de Groot

herbert.de-groot@uni-duisburg-essen.de

Affiliation University of Duisburg-Essen, Institute of Physiological Chemistry, University Hospital Essen, Essen, Germany

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: HdG. Performed the experiments: KF RV. Analyzed the data: KF NS CP JF HdG. Contributed reagents/materials/analysis tools: JF HdG. Wrote the paper: KF HdG.