4) Gasbarrini A, et al.: Regression of autoimmune thrombocytopenia after eradication of Helicobacter pylori. Lancet 352: 878, 1998
5) Peterson WL, et al.: Clarithromycin as monotherapy for eradication of helicobacter pylori: a randomized, double-blind trial. Am J Gastroenterol 88: 1860∼1864, 1993