- 1、anulushemorrhoidalis2、anulusinguinalisprofundus3、anulusinguinalissuperficialis4、Demineralizedanddecellularboneasscaffoldforinvitroconstructionofintervertebraldiscanulusfibrosus5、Besidesaging,weightbearingisprobablyakeyfactoroftheincreaseofanul...
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