1. Virology, Department of Medical Microbiology, University Medical Center Utrecht, The Netherlands;
2. Department of Infection and Immunity, Luxembourg Institute of Health, Esch-sur-Alzette, Luxembourg;
3. Department of Internal Medicine, Dr Horacio E. Oduber Hospital, Oranjestad, Aruba;
4. Department of Internal Medicine and Infectious Diseases, University Medical Center Utrecht, The Netherlands;
5. Africa Centre for Population Health, and
6. School of Laboratory Medicine and Medical Sciences, College of Health Sciences, University of KwaZulu-Natal, Durban, Republic of South Africa