title: Smoking motivation factos.
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D001007:Anxiety; D005163:Factor Analysis, Statistical; D005260:Female; D006801:Humans; D008297:Male; D009042:Motivation; D012063:Relaxation; D012737:Sex Factors; D012907:Smoking