1. Allergy and Clinical Immunology Division, Internal Medicine Department, Faculty of Medicine Public Health and Nursing Gadjah Mada University, Yogyakarta, Indonesia
2. Gastroentero-Hepatology Division, Internal Medicine Department, Faculty of Medicine Public Health and Nursing Gadjah Mada University, Yogyakarta, Indonesia
3. Gastroentero-Hepatology Division, Paediatric Department, Faculty of Medicine Public Health and Nursing Gadjah Mada University, Yogyakarta, Indonesia