Topical tartrazine as an unusual cause of nail staining.
D001391:Azo Compounds / Q000494:pharmacology*; D003116:Color; D005260:Female; D006801:Humans; D008875:Middle Aged; D009262:Nails / Q000187:drug effects*; D013645:Tartrazine / Q000494:pharmacology*
D001391:Azo Compounds; D013645:Tartrazine