1. Faculty of MedicineUniversity of HelsinkiHelsinki Finland
2. Oxford University Clinical Research UnitHo Chi Minh City Vietnam
3. Dong Thap Provincial Center for Disease Control Dong Thap Province Vietnam
4. Centre for Tropical Medicine and Global HealthOxford UniversityOxford United Kingdom
5. Department of Veterinary Biosciences, Faculty of Veterinary MedicineUniversity of HelsinkiHelsinki Finland
6. Department of Virology and ImmunologyHUSLAB, Helsinki University HospitalHelsinki Finland
7. Department of MedicineUniversity of CambridgeCambridge United Kingdom