H. pylori and gastric cancer: limitations of retrospective studies.
Kuipers
E J
EJ
Peña
A S
AS
Meuwissen
S G
SG
D000367:Age Factors; D000368:Aged; D016481:Helicobacter Infections / Q000150:complications* / Q000453:epidemiology; D016480:Helicobacter pylori / Q000502:physiology*; D006801:Humans; D012189:Retrospective Studies; D013274:Stomach Neoplasms / Q000453:epidemiology / Q000209:etiology* / Q000382:microbiology