[Morbidity and mortality of newborn infants with a birth weight less than 1,500 grams].
D002677:Chile; D006801:Humans; D007226:Infant Mortality; D007230:Infant, Low Birth Weight; D007231:Infant, Newborn; D007232:Infant, Newborn, Diseases / Q000453:epidemiology*
Morbilidad y mortalidad de recién nacidos con peso de nacimiento inferior a 1.500 gramos.