| establishment of a binational cohort to study helicobacter pylori infection in children. | chronic helicobacter (h.) pylori infection, typically of childhood onset, causes upper digestive tract diseases of major impact among socioeconomically marginalized populations. this infection is common in children from ethnic minorities in the united states, and particularly so in immigrant children from mexico. prevention measures for h. pylori infection do not yet exist, given limited understanding of what causes either acute or persistent infection. to address this gap, we initiated the pasi ... | 2003 | 12894964 |