title: Increasing the validity of self-reports of smoking behavior in children.
mesh_terms: D000293:Adolescent; D005260:Female; D006801:Humans; D008297:Male; D009538:Nicotine / Q000032:analysis; D012463:Saliva / Q000032:analysis; D012649:Self Concept; D012647:Self-Assessment; D012907:Smoking; D014743:Videotape Recording
chemical_list: D009538:Nicotine