Your Query returns 4 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Spp-1NM_00926310090Eta    Opn    Ric    BNSP    BSPI    Opnl    Apl-1    ETA-1    minopontin    Spp1   
spp-1NC_0032816239T07C4.4    CELK07010   
spp-1NM_0668896239T07C4.4    CELK07010   
spp-1Z294436239

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

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Text2Knowledge ... Yong Huang 2002