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The above copyright notice and this permission notice shall be included in
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                                 PUBLIC DOMAIN NOTICE
                    National Center for Biotechnology Information

       This software/database is a "United States Government Work" under the
       terms of the United States Copyright Act.  It was written as part of
       the author's official duties as a United States Government employee and
       thus cannot be copyrighted.  This software/database is freely available
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       Although all reasonable efforts have been taken to ensure the accuracy
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       Please cite the author in any work or product based on this material.