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Accrued and Other Current Liabilities | 12 Months Ended
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Dec. 31, 2017
Accrued and Other Current Liabilities |
Accrued and Other Current Liabilities | 8. Accrued and Other Current Liabilities Accrued and other current liabilities consisted of the following at December 31, 2016 and 2017 (in thousands):
|  |  | December 31, |
|  |  | 2016 |  |  | 2017 |
Accrued research and development |  |  |  | $ | 2,138 |  |  |  |  | $ | 1,645 |  |
Accrued legal and professional fees |  |  |  |  | 194 |  |  |  |  |  | 248 |  |
Other current liabilities |  |  |  |  | 430 |  |  |  |  |  | 662 |  |
|  |  |  | $ | 2,762 |  |  |  |  | $ | 2,555 |  |
Other current liabilities in 2017 include $150,000 deferred income in respect of payment received in advance of achieving a milestone under the ManRos agreement (see Note 3 — Significant Contracts).

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