title: Letter: Dried human umbilical cords and study of pollutants.
mesh_terms: D001713:Biphenyl Compounds / Q000032:analysis; D002648:Child; D002675:Child, Preschool; D005612:Freeze Drying; D006801:Humans; D007223:Infant; D014470:Umbilical Cord / Q000032:analysis*; D014873:Water Pollutants / Q000032:analysis*; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D001713:Biphenyl Compounds; D014873:Water Pollutants; D014874:Water Pollutants, Chemical