NIH Is Replacing Letters of Support with Letters of Collaboration to Reduce Administrative Burden

As part of the NIH's ongoing efforts to increase efficiency and minimize applicant burden, it is aligning its letter of support requirements in applications with the format currently used by the National Science Foundation (NSF). NIH letters of support will be replaced with letters of collaboration. Currently, letters of support for NIH applications may come from a variety of stakeholders, including collaborators, institutions, potential users of a resource, or any other interested parties, and can be a page or more in length. 

More information can be found here: https://grants.nih.gov/grants/guide/notice-files/NOT-OD-26-094.html