• abstract
• ack
• aff
• alt-text
• app
• app-group
• article
• article-categories
• article-id
• article-meta
• article-title
• attrib
• author-comment
• award-group
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• back
• bio
• body
• bold
• break
• caption
• col
• colgroup
• collab
• contrib
• contrib-group
• copyright-holder
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• copyright-year
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• disp-formula
• disp-quote
• elocation-id
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• ext-link
• fig
• front
• front-stub
• funding-group
• funding-source
• funding-statement
• given-names
• history
• inline-formula
• inline-graphic
• institution
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• issue
• issue-title
• italic
• journal-id
• journal-meta
• journal-title
• journal-title-group
• kwd
• kwd-group
• label
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• license-p
• list
• list-item
• long-desc
• media
• mixed-citation
• monospace
• month
• name
• named-content
• note
• open-access
• p
• permissions
• prefix
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• principal-award-recipient
• principal-investigator
• pub-date
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• publisher
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• ref
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• related-article
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• season
• sec
• self-uri
• sub
• subj-group
• subject
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• supplementary-material
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• tbody
• td
• tex-math
• tfoot
• th
• thead
• title
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• tr
• underline
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• xref
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Element: principal-investigator