Your Query returns 2 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
DMKBC0625539606DM    DM1    DMPK    605377
DMKNM_0044099606DM    DM1    DMPK    605377

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* OMIM link based on symbol match for human and mouse.

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Text2Knowledge ... Yong Huang 2002