NIH offers guidance on selecting a repository for interim research products including preprints.
The NIH strongly encourages interim research products arising from NIH funds to be deposited in repositories that ensure:
Source: Reporting Preprints and Other Interim Research Products
Per International Committee of Medical Journal Editors (ICMJE): Authors who choose to post their work on a preprint server should choose one that clearly identifies preprints as not peer-reviewed work and includes disclosures of authors’ relationships and activities.
Source: Recommendations for the Conduct, Reporting, Editing, and Publication of Scholarly Work in Medical Journals, December 2024.