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undefined language relationshipuse @lang-focus

<underline> Underline

undisclosed authorsee <anonymous>

Uniform Resource Identifieruse <uri>

Uniform Resource Identifier (URI)

unique identifiersee @id

@units Units

units of measuresee <size>use @units

universitysee <aff>see <institution>

university degreeuse <degrees>

University faculty IDsee @contrib-id-type

unknown, authorsee <anonymous>

unknown language variantuse @lang-variant

unordered listsee <list>

unprinted itemsee <supplementary-material>

unprinted-itemsee @supplemental

unstructured citation textsee <comment>

<uri>

URI for This Same Article Online

URLsee <ext-link>see <self-uri>see <uri>

@use-type

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