LICENSE

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Public Domain Notice
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This work is a "United States Government Work" under the terms of the
United States Copyright Act. It was written as part of the authors'
official duties as a United States Government employee and thus cannot
be copyrighted within the United States. The data is freely available
to the public for use. The National Library of Medicine and the U.S.
Government have not placed any restriction on its use or reproduction
                                                                            
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