Attribute: rid
| Value | In Elements |
|---|---|
| IDREF | <ext:resource> <milestone-end> <overline-end> <underline-end> <supplementary-material> <milestone-start> |
| IDREFS | <funding-source> <named-content> <def> <sig-block> <contrib> <award-group> <term> <award-id> <xref> <sig> <author-notes> <aff> <ext:item> <funding-statement> <bio> |