The National Institutes of Health (NIH) is inviting applications for the "Ancillary Studies to Ongoing Clinical Projects" grant (FON: PAR-24-289), aimed at supporting time-sensitive ancillary studies that leverage existing resources from active clinical projects related to the mission of the National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS). This funding opportunity encourages innovative research that enhances the scientific content of parent projects, with eligible studies potentially including interventional trials or observational studies that utilize well-characterized cohorts, data, and biological samples. The total budget for direct costs is capped at $300,000 per year, with projects lasting a maximum of four years, and applications must be submitted electronically by September 5, 2025. For further inquiries, applicants can contact NIH Grants Information at grantsinfo@nih.gov.