title: Letter: Particulate matter in Ancef and Kefzol.
mesh_terms: D002511:Cephalosporins; D004340:Drug Contamination; D008851:Micropore Filters; D010316:Particle Size; D011786:Quality Control; D013440:Sulfides; D013777:Tetrazoles; D013830:Thiadiazoles
chemical_list: D002511:Cephalosporins; D013440:Sulfides; D013777:Tetrazoles; D013830:Thiadiazoles