Sianturi, Grace Nami, Evita H Effendi, and Ari Fahrial Syam. 2005. “Helicobacter Pylori Infection in Idiopathic Chronic Urticaria”. The Indonesian Journal of Gastroenterology, Hepatology, and Digestive Endoscopy 6 (2):48-54. https://doi.org/10.24871/62200548-54.