1. Institute of Tropical Disease, Airlangga University
2. Center for Infectious Diseases, Kobe University Graduate School of Medicine
3. Department of Gastroenterology, Kobe University Graduate School of Medicine
4. Department of Physiology, Dr. Sardjito Hospital, Gadjah Mada University
5. Department of Anatomical Pathology, Faculty of Medicine, Dr. Sardjito Hospital, Gadjah Mada University