Costa F, Mumolo MG, Bellini M, Romano MR, Manghetti M, Paci A, Maltinti G, Marchi S. Post-treatment diagnostic accuracy of a new enzyme immunoassay to detect Helicobacter pylori in stools. Aliment Pharmacol Ther. 2001 Mar;15(3):395–401. doi: 10.1046/j.1365-2036.2001.00928.x. PMID: 11207515.