1. Institute of Food Chemistry, Hamburg School of Food Science, University of Hamburg, Grindelallee 117, 20146 Hamburg, Germany
2. Molecular Preventive Medicine, Institute for Infection Prevention and Hospital Infection Control, Medical Center, University of Freiburg, 79106 Freiburg, Germany
3. Leibniz Institute of Vegetable and Ornamental Crops, Theodor-Echtermeyer-Weg 1, D-14979 Großbeeren, Germany