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adolescent
4
article
4
child
controlled study
female
4
human
4
major clinical study
4
male
risk factor
Adolescent
2
Argentina
2
Chest radiographs
2
Child
2
Child, Preschool
2
Children
2
Community-Acquired Infections
2
Diagnosis, Differential
2
Epidemiology
2
Female
2
H pylori
2
Helicobacter infection
2
Helicobacter pylori
2
Humans
2
Infant
2
Male
2
Models, Statistical
2
Pneumonia
2
Predictive Value of Tests
2
Predictive factors
2
Prevalence
2
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