1. Institute of Agricultural Sciences in the Tropics, University of Hohenheim, Stuttgart, Germany
2. Institute of Animal Nutrition and Physiology, Christian-Albrechts-Universität zu Kiel, Kiel, Germany
3. Lehrfach Variationsstatistik, Christian-Albrechts-Universität zu Kiel, Kiel, Germany
4. Institute of Crop Science and Plant Breeding – Grass and Forage Science/Organic Agriculture, Christian-Albrechts-Universität zu Kiel, Kiel, Germany