Your Query returns 4 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
HttNM_01048410090Sert    5-HTT    Slc6a4    182138
httNM_01041410090HD    IT15    Hdh    182138
HttNM_1433727227HD    CG9995    Hsap\HD    huntingtin   
HttNT_0337777227HD    CG9995    Hsap\HD    huntingtin   

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

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Text2Knowledge ... Yong Huang 2002