[Prevalence and associated risk factors of smoking among high school students in the city of Lleida].
Bozal
J
J
Portillo
A
A
Godoy
P
P
D000293:Adolescent; D005260:Female; D006801:Humans; D008297:Male; D015995:Prevalence; D012307:Risk Factors; D012907:Smoking / Q000453:epidemiology*; D013030:Spain