A--NIH NeuroBioBank Brain and Tissue Repository

Due to the complexity and nature of this requirement, the extent of specimen accrual, maintenance, data management, storage and distribution of the brain tissues is unknown. As a result, uncertainties involved in contract performance do not permit costs to be estimated with sufficient accuracy to use any type of fixed-price contract. Therefore, a cost reimbursement type contract was used for this acquisition due to the absence of precise specifications and difficulties in estimating costs with accuracy.