1. University of Tartu; Tartu Estonia
2. Centre for International Health; University of Bergen; Bergen Norway
3. Department of Occupational Medicine; Haukeland University Hospital; Bergen Norway
4. University of Cape Town; Cape Town South Africa
5. Human Development & Health, Faculty of Medicine; University of Southampton; Southampton UK
6. Department of Global Public Health and Primary Care; University of Bergen; Bergen Norway
7. Department of Clinical Science; University of Bergen; Bergen Norway
8. Aarhus University; Aarhus Denmark
9. National Research Centre for the Working Environment; Copenhagen Denmark
10. Institute of Infectious Disease and Molecular Medicine/Division of Immunology; University of Cape Town; Cape Town South Africa
11. Institute of Microbiology and Infection; University of Birmingham; Birmingham UK
12. Laboratory of Molecular and Experimental Immunology and Neurogenetics; UMR 7355; CNRS-University of Orleans and Le Studium Institute for Advanced Studies; Orléans France