To support shared resources and facilities for categorical research by a number of investigators from different disciplines who provide a multidisciplinary approach to a joint research effort or from the same discipline who focus on a common research problem. The core grant is integrated with the center's component projects or program projects, though funded independently from them. This support, by providing more accessible resources, is expected to assure a greater productivity than from the separate projects and program projects. The Linked Center Core Grant is administratively linked to another project or projects. A PL1 award may only be disaggregated from a U54 application and organizations may not apply for a PL1, Linked Center Core Grant. The PL1 is used in lieu of the P30 for those programs that offer linked awards.