Contract or grant number of the supported work described in an article
If an acronym for the sponsor is available, insert it before the number.
<!ELEMENT contract-num (#PCDATA %contract-elements;)* >
Text, numbers, or special characters, zero or more
<article> <front> <article-meta>... <abstract>...</abstract> <kwd-group>...</kwd-group> <contract-num>NSF DBI-0317510</contract-num> <contract-sponsor>ARDA AQUAINT</contract-sponsor> </article-meta> </front> <body>...</body> <back> <ack> <p>... Part of the research at Stanford was supported by NIH GM61374. The Berkeley portion of this research was supported by NSF DBI-0317510, an ARDA AQUAINT contract, and a gift from Genentech Corp.</p> </ack> ... </back> </article>