1. Bandim Health Project, INDEPTH Network, Bissau Codex, Guinea-Bissau
2. Department of Infectious Diseases, Odense University Hospital, Odense C, Denmark
3. Department of Endocrinology, Odense University Hospital, Odense C, Denmark
4. National Public Health Laboratory, Bissau, Guinea-Bissau
5. The Danish Twin Registry, Epidemiology, Institute of Public Health, University of Southern Denmark, Odense C, Denmark
6. Department of Clinical Genetics, Odense University Hospital, Odense C, Denmark
7. Research Center for Vitamins and Vaccines, Statens Serum Institute, Copenhagen S, Denmark
8. Clinical Institute, University of Southern Denmark, Odense C, Denmark
9. Department of Clinical Biochemistry and Pharmacology, Odense University Hospital, Odense C, Denmark