The National Library of Medicine (NLM) is the worldís largest biomedical library and a key provider of clinical and regulatory information resources.
NLM manages PubMed, ClinicalTrials.gov, MedlinePlus, and other databases used for trial registration, literature review, and scientific transparency. Researchers rely on NLM tools to identify prior studies, support protocol rationale, and meet public disclosure requirements. NLM terminology standards also support interoperability and structured data exchange across clinical systems. Its resources promote evidence-based study design and improved access to clinical research information.