RT Journal Article SR Electronic T1 Helicobacter pylori. JF Archives of Disease in Childhood JO Arch Dis Child FD BMJ Publishing Group Ltd and Royal College of Paediatrics and Child Health SP 559 OP 559 DO 10.1136/adc.66.4.559-d VO 66 IS 4 A1 A N Campbell YR 1991 UL http://adc.bmj.com/content/66/4/559.2.abstract AB