1. Institute of Social and Preventive Medicine (ISPM) University of Bern Bern Switzerland
2. Faculty of Epidemiology and Population Health London School of Hygiene and Tropical Medicine London UK
3. Swiss Tropical and Public Health Institute Basel Switzerland
4. University of Basel Basel Switzerland
5. Centre for Infectious Disease Epidemiology and Research (CIDER) University of Cape Town Cape Town South Africa
6. Population Health Sciences Bristol Medical School University of Bristol Bristol UK