1. Department of Human Nutrition, Faculty of Life Sciences, University of Copenhagen, 1958 Frederiksberg, Denmark
2. National Institute for Medical Research, Muhimbili Medical Research Centre, Dar es Salaam, Tanzania
3. National Institute for Medical Research, Mwanza Medical Research Centre, Mwanza, Tanzania
4. Department of Clinical Biochemistry, Aalborg University Hospital, 9100 Aalborg, Denmark
5. DBL–Centre for Health Research and Development, Department of Veterinary Pathobiology, Faculty of Life Sciences, University of Copenhagen, 1958 Frederiksberg, Denmark
6. Department of Infectious Diseases, Rigshospitalet, University of Copenhagen, 2100 Copenhagen, Denmark