title: The etiology of malnutrition among preschool children in rural Costa Rica.
mesh_terms: D002675:Child, Preschool; D003364:Costa Rica; D005260:Female; D006801:Humans; D007223:Infant; D007228:Infant Nutrition Disorders / Q000209:etiology; D008297:Male; D009748:Nutrition Disorders / Q000209:etiology*; D012423:Rural Health