Helicobacter pylori infection and overcrowding in childhood.
O P
OP
Galpin
C J
CJ
Whitaker
A J
AJ
Dubiel
D002648:Child; D005190:Family; D016481:Helicobacter Infections / Q000635:transmission*; D016480:Helicobacter pylori; D006801:Humans; D011156:Population Density; D012923:Social Class; D012959:Socioeconomic Factors