TY - RPRT TI - Unexpected decrease with age of Helicobacter pylori seroprevalence among Swedish blood donors. AU - M Sörberg AU - O Nyrén AU - M Granström PY - 2003 DO - 10.1128/jcm.41.9.4038-4042.2003 UR - https://pubmed.ncbi.nlm.nih.gov/12958222/ ID - 12958222 ER -