Instruction and study (2) Family relationships (2) Prevention (2) Teenagers (2) Tobacco use (2) Teachers (2) Stepfamilies (2) Smoking (2) Schools (2) Risk (2) Remarriage (2) Parents (2) Life (2) Girls (2) French (2) Average (2) Nicotine addiction (2) Use (2) Usage (2) Influence (2) Practice (2) Infancy (2) Health (2) Students (2) Family (2) Segundas nupcias (2) Salud (2) Niñas (2) Profesores (2) Centros docentes (2)