RT Journal Article SR Electronic T1 Seroconversion for Helicobacter pylori. JF Journal of Clinical Pathology JO J Clin Pathol FD BMJ Publishing Group Ltd and Association of Clinical Pathologists SP 286 DO 10.1136/jcp.47.3.286-b VO 47 IS 3 A1 G Oderda A1 D Vaira A1 J Holton YR 1994 UL http://jcp.bmj.com/content/47/3/286.2.abstract AB