[The smoking habit in an urban student population].
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D002677:Chile; D005260:Female; D006801:Humans; D008297:Male; D012737:Sex Factors; D012907:Smoking; D013334:Students; D014505:Urban Population
Hábito de fumar en población escolar urbana.