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Accrued Expenses (Tables) | 12 Months Ended
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Dec. 31, 2020
Accrued Expenses |
Schedule of accrued expenses |
|  | December 31,
|  | 2019 |  | 2018
Clinical trials |  | $ | 795 |  | $ | 1,828
Professional fees |  |  | 255 |  |  | 609
Payroll and related expenses |  |  | 1,697 |  |  | 1,004
Accrued expenses |  | $ | 2,747 |  | $ | 3,441

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