1. Department of Parasitology; Leiden University Medical Center; Leiden The Netherlands
2. Department of Internal Medicine; Faculty of Medicine; Universitas Indonesia; Dr. Cipto Mangunkusumo National General Hospital; Jakarta Indonesia
3. Department of Parasitology; Faculty of Medicine; Universitas Indonesia; Jakarta Indonesia
4. Department of Internal Medicine; Radboud University Medical Centre; Nijmegen The Netherlands
5. Department of Internal Medicine; Leiden University Medical Center; Leiden The Netherlands