European smoke-free class competition.
Hanewinkel
R
R
Wiborg
G
G
Paavola
M
M
Vartiainen
E
E
D000293:Adolescent; D003163:Competitive Behavior; D005060:Europe; D006293:Health Promotion; D006801:Humans; D016540:Smoking Cessation; D000074606:Smoking Prevention