Conference (Unpublished)

There is disagreement concerning Best practice for tagging citations to conference papers, conference proceedings, and unpublished conference material. See a fuller discussion under Conferences in Citations.
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<ref>
 <element-citation publication-type="paper">
  <name><surname>Thabet</surname>
   <given-names>A</given-names></name>
  <article-title>Clinical value of two serial pulmonary
   embolism-protocol CT studies performed within ten
   days</article-title>
  <conf-name>Annual Scientific Meeting and Postgraduate
   Course of the American Society of Emergency Radiology</conf-name>
  <conf-date iso-8601-date="2006-09-27">2006 Sep 27-30</conf-date>
  <conf-loc>Washington, DC</conf-loc>
 </element-citation>
</ref>
...

...
<ref>
 <mixed-citation publication-type="paper">
  <string-name><surname>Thabet</surname>
  <given-names>A</given-names></string-name>.
  <article-title>Clinical value of two serial pulmonary
  embolism-protocol CT studies performed within ten
  days</article-title>. <conf-name>Annual Scientific
  Meeting and Postgraduate Course of the American
  Society of Emergency Radiology</conf-name>;
  <conf-date iso-8601-date="2006-09-27">2006 Sep
  27-30</conf-date>; <conf-loc>Washington, DC</conf-loc>.
 </mixed-citation>
</ref>
...