title: Erratum to: Prevalence of Helicobacter pylori Infection Worldwide: A Systematic Review of Studies with National Coverage.
authors.affiliation: Department of Clinical Epidemiology, Predictive Medicine and Public Health, University of Porto Medical School, Al. Prof. Hernâni Monteiro, 4200-319, Porto, Portugal, barbarap@med.up.pt.
authors.forename: Bárbara
authors.initials: B
authors.lastname: Peleteiro
authors.forename: Ana
authors.initials: A
authors.lastname: Bastos
authors.forename: Ana
authors.initials: A
authors.lastname: Ferro
authors.forename: Nuno
authors.initials: N
authors.lastname: Lunet