sentences:  The Steering Committee is tasked with overseeing the scientific validity of the project while the NCI/NHGRI project team ensures that the scientific progress and goals of the project are met, the project is completed on time and on budget and the coordination of the various components of the project.Tissue requirements varied from tissue type to tissue type and from cancer type to cancer type.Disease experts from the project's Disease Working Groups helped to define the characteristics of the typical tissue samples accrued as "standard of care" in the United States and how TCGA can best utilize the tissue.