Ouwendijk, M.

study pylori singleton subject adhd symptoms children problem infection trajectorie symptom attention problems helicobacter pylori infection class child sample attention level psychiatry pylori infection population childhood model prevalence cancer gastriti dutch netherland helicobacter difference factor assessment development \0.001 pepsinogen country teacher number origin 12 years risk factors table disease identi fied group adolesc disorder screening fi ndings gastroenterol intercept score immigrant erasmus mc status trajectory peptic ulcer disease department psychol high-decreasing verhulst ap scores ulcer rating hyperactivity variance result turkish peptic ficit hyperactivity disorder hudziak jj erasmu antillean pylori-related complications surinamese university serologic dutch subjects moroccan slope scale