Sianturi, G. N., Effendi, E. H. and Syam, A. F. (2005) “Helicobacter pylori Infection in Idiopathic Chronic Urticaria”, The Indonesian Journal of Gastroenterology, Hepatology, and Digestive Endoscopy, 6(2), pp. 48–54. doi: 10.24871/62200548-54.