1. College of Medicine; University of Malawi; Blantyre Malawi
2. Liverpool School of Tropical Medicine; Liverpool UK
3. School of Public Health and Family Medicine; University of Cape Town; Cape Town South Africa
4. Institute of Social and Preventive Medicine (ISPM); University of Bern; Bern Switzerland
5. Department of Infectious Diseases; University Hospital Bern; Bern Switzerland
6. Department of Infectious Diseases; University of Dakar; Dakar Senegal