Your Query returns 8 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
HBD1BC0476779606HBD-1    DEFB-1    DEFB101    BD1    DEFB1   
HBD1NM_0052189606BD1    HBD-1    DEFB-1    DEFB101    DEFB1   
hbd1AE00501464091VNG0681G   
hbd1AE00443764091VNG0681G   
HBD1AB1026949606
hbd1NC_00260764091
hbd1AE017289267671
hbd1NC_005823267671

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

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Text2Knowledge ... Yong Huang 2002