title: Variation in food quality may threaten the validity of epidemiological studies in China.
authors.forename: Wenbin
authors.initials: W
authors.lastname: Liang
mesh_terms: D002681:China; D016021:Epidemiologic Studies; D005260:Female; D005502:Food / Q000592:standards*; D005513:Food Inspection / Q000592:standards*; D006801:Humans; D007223:Infant; D008297:Male