Number, name, or other identifier of a sub-part of a journal issue.
Text, numbers, or special characters, zero or more
<element-citation>, <mixed-citation>, <related-article>, <related-object>
...
<ref>
<mixed-citation publication-type="journal" publication-format="print">
<string-name><surname>Gosse</surname>,
<given-names>P</given-names></string-name>,
...
<string-name><surname>Clementy</surname>,
<given-names>J</given-names></string-name>.
<article-title>Reduction in arterial distensibility
in hypertensive patients as evaluated by ambulatory
measurement of the QKD interval is correlated with
concentric remodeling of the left ventricle</article-title>.
<source>Am J Hypertens</source>. <year>1999</year>
<month>Dec</month>;<volume>12</volume>
(<issue>12</issue> <issue-part>Pt 1-2</issue-part>):
<fpage>1252</fpage>-<lpage>1255</lpage>.</mixed-citation>
</ref>
...
JATS-common0.ent