1. Laboratory of Human Nutrition, Department of Health Sciences and Technology, ETH Zurich, Zurich, Switzerland;
2. Fernfachhochschule Schweiz, Brig, Switzerland;
3. Charité–Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin–Berlin Institute of Health, Berlin, Germany;
4. Department of Infectious Diseases, Respiratory and Critical Care Medicine, Charité–Universitätsmedizin Berlin, Berlin, Germany;
5. Department of Laboratory Medicine, Radboud University Nijmegen Medical Center, Nijmegen, The Netherlands;
6. Hepcidinanalysis.com, Nijmegen, The Netherlands;
7. Ifakara Health Institute, Dar es Salaam, Tanzania;
8. Institute of Social and Preventive Medicine, University of Bern, Bern, Switzerland; and
9. MRC Human Immunology Unit, MRC Weatherall Institute of Molecular Medicine, University of Oxford, John Radcliffe Hospital, Oxford, United Kingdom