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Accrued Expenses | 12 Months Ended
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Dec. 31, 2020
Accrued Expenses |
Accrued Expenses | (6) Accrued Expenses Accrued expenses consisted of the following:
|  | As of December 31,
|  | 2020 |  | 2019
Payroll and related benefits |  | $ | 16,493 |  | $ | 131,530
Accrued interest expense |  |  | — |  |  | 36,041
Accrued professional and clinical fees |  |  | 216,198 |  |  | 103,300
Accrued license payments |  |  | 3,833 |  |  | 506,000
|  | $ | 236,524 |  | $ | 776,871
See Note 8 for further detail on the accrued license payments.

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