Eisig, J.N., Silva, F.M., Hashimoto, C., Chehter, E.Z. and Laudanna, A.A. 2003. Therapeutic efficacy of ranitidine bismuth citrate with clarithromycin for seven days in the eradication of Helicobacter pylori in Brazilian peptic ulcer patients. São Paulo Medical Journal. 121, 1 (Jan. 2003), 15–18.