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Arctic medicine. Tropical medicine
1
Infant mortality
1
Medicine
1
Mortalidad infantil
1
Public aspects of medicine
1
R
1
RA1-1270
1
RC955-962
1
cohort studies
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desigualdad
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developing countries
1
estudios de cohortes
1
estudios prospectivos
nequalities
1
países en desarrollo
1
prospective studies
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