Additional File 6.

Perl script for extracting UMLS codes for SNOMED-derived terms The Perl script produces a file (snomout.txt) containing all UMLS terms with a SNOMED-CT vocabulary relationship It requires the external file MRCXT (available at no cost from the National Library of Medicine) to reside in the same directory as snomout.txt. It produces an output file, snomout.txt that has a size of 1,895,054,040 bytes. This script may take more than one-half hour to execute.

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Berman BMC Cancer 2004 4:88   doi:10.1186/1471-2407-4-88