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PRA Raises \$68.4 Million In Its IPO PRA International Inc., a McLean company that manages clinical trials for drug companies, plans to use some of the funds to hire staff as it expands its worldwide operations. &lt;FONT face="verdana,MS Sans Serif,arial,helvetica" size="-2" color="#666666"&gt;&lt;B&gt;-The Washington Post&lt;/b&gt;&lt;/font&gt; 