1. Department of Internal Medicine Faculty of Medicine Universitas Indonesia, Cipto Mangunkusumo General Hospital Jakarta Indonesia
2. Clinical Epidemiology and Evidence‐Based Medicine Unit Faculty of Medicine Universitas Indonesia, Cipto Mangunkusumo General Hospital Jakarta Indonesia
3. Division of Gastroenterology, Department of Internal Medicine Faculty of Medicine Universitas Indonesia, Cipto Mangunkusumo General Hospital Jakarta Indonesia