The National Institutes of Health (NIH) has announced a funding opportunity titled "Analytical Validation of a Candidate Biomarker for Neurological or Neuromuscular Disorders (U01 Clinical Trial Optional)." This initiative aims to support the rigorous analytical validation of methods used to measure biomarkers for neurological and neuromuscular disorders, which are critical for clinical trials and practice. Applicants are required to demonstrate the unmet need for the biomarker(s) and measurement methods, detailing activities such as optimizing accuracy, precision, and establishing quality control procedures across multiple sites. The submission portal opens on January 21, 2025, with applications due by June 22, 2026. For further inquiries, interested parties can contact NIH Grants Information at grantsinfo@nih.gov, and additional details can be found at the provided link: https://grants.nih.gov/grants/guide/pa-files/PAR-25-050.html.