MeSH Browser (2012 MeSH): The files are updated every week on Sunday. Go to 2013 MeSH    Enter term or the beginning of fragments: Search Options: All Main Headings Qualifiers Supplementary Concepts MeSH Unique ID Text words in Annotation & Scope Note Search in these fields of chemicals:      Heading Mapped To (HM) (Supplementary List)      Indexing Information (II) (Supplementary List)      Pharmacological Action (PA)      CAS Registry/EC Number (RN)      Related CAS Registry Number (RR) MeSH vocabulary suggestions About MeSH Browser | MeSH Home Page | Questions or Comments NLM Classification, the scheme used to categorize and organize books, audiovisuals, and similar materials.

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