Your Query returns 9 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Nos2aNM_01261110116iNos    Nos2   
NOS2AAF0176349606163730
NOS2AAF375649118643
NOS2AAF440783960617    163730
NOS2AAF440784960618    163730
NOS2AAF440785960619    163730
NOS2ANM_0006259606NOS    INOS    NOS2    HEP-NOS    163730
NOS2ANM_1532929606NOS    INOS    NOS2    HEP-NOS    163730
NOS2ANT_0107999606163730

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

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Text2Knowledge ... Yong Huang 2002