risque (3) Teenagers (3) Risk (3) Use (3) statistiques (2) peau (2) comportement (2) établissement scolaire (2) couverture (2) âge (2) mesure de protection (2) taux (2) Clothing (2) Children (2) Campaigns (2) Statistics (2) Role models (2) Year (2) Weights and measures (2) Ultraviolet radiation (2) Swiss (2) Sun (2) Students (2) Statistics (2) Skin (2) Shades and shadows (2) School children (2) Questionnaires (2) Public schools (2) Performance (2)