Copper SulfateCopperEmeticsBurns, ChemicalEsophageal StenosisCorrosionLyeEsophagusTrapidilDilatationEsophagoscopyUpper Gastrointestinal TractEsophageal PerforationAcidsEsophageal DiseasesMaterials TestingSulfatesNigeriaChondroitinCeruloplasminMagnesium SulfateGlycosaminoglycansChondroitin SulfatesCation Transport ProteinsHepatolenticular DegenerationKeratan SulfateDermatan SulfateZincMenkes Kinky Hair SyndromeTime FactorsRetrospective StudiesHeparitin SulfateSulfatasesSulfuric AcidsSulfur IsotopesChromatography, GelUronic AcidsCopper RadioisotopesProteoglycans