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Accrued expenses and other current liabilities | 6 Months Ended
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Jun. 30, 2013
Accrued expenses and other current liabilities | 2. Accrued expenses and other current liabilities Accrued expenses and other current liabilities are comprised of the following (in thousands):
|  | June 30, 2013 |  |  | December 31, 2012 |
Salary and related expenses |  | $ | 8,146 |  |  | $ | 10,074 |
Research and clinical trial costs |  |  | 6,558 |  |  |  | 5,995 |
Accrued interest |  |  | 7,911 |  |  |  | 4,533 |
Construction in progress |  |  | 2,661 |  |  |  | 3,878 |
Other |  |  | 1,708 |  |  |  | 1,297 |
Accrued expenses and other current liabilities |  | $ | 26,984 |  |  | $ | 25,777 |

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- Definition The entire disclosure for accounts payable and accrued liabilities at the end of the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19 -Subparagraph a -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(a),20,24) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20, 24 -Article 5 + Details
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