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&lt;p style="TEXT-INDENT: 0.25in; MARGIN: 0in 0in 0pt;"&gt;&lt;font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt;" size="2"&gt;The income tax provision for interim periods is determined using an estimated annual effective tax rate adjusted for discrete items, if any, which are taken into account in the quarterly period in which they occur. The Company reviews and updates its estimated annual effective tax rate each quarter. For the six months ended June&amp;#160;30, 2013, the Company&amp;#8217;s estimated annual effective tax rate was zero. The Company did not record an income tax provision or tax benefit for the six months ended June&amp;#160;30, 2013.&lt;/font&gt;&lt;/p&gt;
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