title: North Carolina dentist studies simple bleaching method with unknown origin.
mesh_terms: D000077463:Carbamide Peroxide; D004338:Drug Combinations; D006801:Humans; D010545:Peroxides; D014073:Tooth Bleaching / Q000379:methods*; D014508:Urea / Q000031:analogs & derivatives*
chemical_list: D004338:Drug Combinations; D010545:Peroxides; D000077463:Carbamide Peroxide; D014508:Urea