A placebo-controlled randomized trial of eradication of Helicobacter pylori in the general population: study design and response rates of the Bristol Helicobacter Project

Lane JA, Harvey RF, Murray LJ, Harvey IM, Donovan JL, Nair P, Egger M. A placebo-controlled randomized trial of eradication of Helicobacter pylori in the general population: study design and response rates of the Bristol Helicobacter Project. Control Clin Trials. 2002; 23(3): 321-32.