Your Query returns 2 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
SDHIPBC0078409606IP    SDH    SDH1    SDHB    185470
SDHIPNM_0030009606IP    SDH    SDH1    SDHB    185470

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

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Text2Knowledge ... Yong Huang 2002