1. Department of Viroscience, Erasmus MC, Rotterdam, the Netherlands;
2. Department of Internal Medicine, Division of Tropical & Infectious Disease, Faculty of Medicine, Airlangga University, Surabaya, Indonesia;
3. Department of Internal medicine, Havenziekenhuis Institute for Tropical Medicine, Rotterdam, the Netherlands;
4. Institute of Tropical Disease, Airlangga University, Surabaya, Indonesia