1. ETH Zürich, Institute of Food Nutrition and Health, Schwerzenbach, Switzerland
2. Institute of Experimental Endocrinology, Slovak Academy of Sciences, Bratislava, Slovakia
3. Institut für Laboratoriumsmedizin Klinische Chemie und Molekulare Diagnostik, Universitätsklinikum Leipzig, Leipzig, Germany
4. Department of Medicine I and Clinical Chemistry, University of Heidelberg, Heidelberg, Germany