1. Department of Gastroenterology and Hepatology; Erasmus MC-University Medical Center Rotterdam; Rotterdam the Netherlands
2. Department of Microbiology; Faculty of Medicine; Gadjah Mada University; Yogyakarta Indonesia
3. Medical Library; Erasmus MC-University Medical Center Rotterdam; Rotterdam the Netherlands
4. Department of Infectious Diseases; The First People's Hospital of Yunnan Province; Kunming China
5. Medical Faculty; Kunming University of Science and Technology; Kunming China