Polyvinyl AlcoholPolyvinyl ChloridePolyvinylsAldehydesPolymersAlcohol DrinkingSurgical SpongesGelatin Sponge, AbsorbableEmbolization, TherapeuticAldehyde DehydrogenasePhenylmercury CompoundsEnbucrilateAlcoholsEthiodized OilFixativesForeign-Body ReactionParticle SizeAldehyde OxidoreductasesDrug CompoundingOphthalmic SolutionsChemoembolization, TherapeuticPreservatives, PharmaceuticalMicrospheresViscosityPovidone