1 Centre for Infectious Disease Control, National Institute for Public Health and the Environment, Antonie van Leeuwenhoeklaan 9, Bilthoven, 3720BA, Netherlands. Electronic address: [email protected].
2 Department of Infectious Disease Epidemiology and Dynamics, London School of Hygiene & Tropical Medicine, London, UK.
3 Department of Infectious Disease Epidemiology and Dynamics, London School of Hygiene & Tropical Medicine, London, UK; Charité Center for Global Health, Charité Universitätsmedizin Berlin, Berlin, Germany.
4 Department of Public Health Antwerp, Institute of Tropical Medicine, Antwerp, Belgium; Julius Centre for Health Sciences and Primary Care, University Medical Centre Utrecht, Utrecht, Netherlands.