Blecker, U Low incidence of Helicobacter pylori infection in children with recurrent abdominal pain in Philadelphia. [electronic resource] - Pediatrics Apr 1995 - 618 p. digital Publication Type: Letter ISSN: 0031-4005 Subjects--Topical Terms: Abdominal Pain--etiologyAdolescentChildChild, PreschoolFemaleHelicobacter Infections--complicationsHelicobacter pyloriHumansIncidenceMalePhiladelphia--epidemiologyRecurrence