title: [The difficulty of selecting a reference sample].
mesh_terms: D000328:Adult; D000428:Alcohol Drinking; D005260:Female; D006801:Humans; D008297:Male; D008722:Methods; D011315:Preventive Medicine; D012494:Sampling Studies; D012907:Smoking
vernacular_title: De la difficulté de sélectionner un échantillon de référence.