RT Journal Article SR Electronic T1 Helicobacter pylori infection in paediatric practice JF Archives of disease in childhood - Education & practice edition JO Arch Dis Child Educ Pract Ed FD BMJ Publishing Group Ltd and Royal College of Paediatrics and Child Health SP ep25 OP ep30 DO 10.1136/adc.2004.065698 VO 90 IS 2 A1 D I Campbell A1 J E Thomas YR 2005 UL http://ep.bmj.com/content/90/2/ep25.abstract AB