1. Norwegian Centre for Imported and Tropical Diseases, Department of Infectious Diseases Ullevaal, Oslo University Hospital, Oslo, Norway
2. Discipline of Public Health Medicine, Nelson R Mandela School of Medicine, School of Public Health, College of Health Sciences, University of KwaZulu-Natal, Durban, South Africa
3. Laboratory of Cancer Research and Clinical Oncology, University of Antwerp, Wilrijk, Belgium
4. Department of Gynaecology and Obstetrics, Oslo University Hospital, Oslo, Norway
5. Imperial College London, Charing Cross Campus, Hammersmith, London, UK