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Arctic medicine. Tropical medicine
2
RC955-962
2
Brazil
1
Congenital
1
Disease notification
1
Epidemiological monitoring
1
Health information systems
1
Medicine
1
Public aspects of medicine
1
Public health surveillance
1
R
1
RA1-1270
1
Syphilis
1
Syphilis serodiagnosis
1
pregnant women
1
prenatal care
1
prevalence
1
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