Your Query returns 9 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
PGHS-2BC0137349606COX-2    COX2    hCox-2    PHS-2    PGG/HS    PTGS2   
PGHS-2NM_0009639606COX2    COX-2    PHS-2    PGG/HS    hCox-2    PTGS2   
PGHS-2U684869940
PGHS-2AF1457509913
PGHS-2AF0316999913
PGHS-2AF0316989913
PGHS-2AY0285839823
PGHS-2L342099606
PGHS-2S8245610095

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

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Text2Knowledge ... Yong Huang 2002