A Novel Tissue-Engineered Heart Valve Scaffold Constructed by Poly (EthyleneGlycol)- Sodium Alginate Hydrogel  Acta Medicinae Universitatis Scientiae et Technologiae Huazhong . 2022, (2): 203 -206 .  DOI: 10.3870/j.issn.1672-0741.2022.02.011