title: Sports involvement can be both formal and informal at the same time: a comment on Peretti-Watel et al.
authors.forename: Fabrice O
authors.initials: FO
authors.lastname: Lorente
mesh_terms: D000293:Adolescent; D000328:Adult; D005260:Female; D006801:Humans; D008297:Male; D013177:Sports / Q000706:statistics & numerical data*; D019966:Substance-Related Disorders / Q000453:epidemiology*