Your Query returns 4 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
PGHS-1BC0298409606PGG/HS    COX1    PTGHS    PGHS1    COX3    PCOX1    PHS1    PTGS1   
PGHS-1NM_0009629606COX1    COX3    PHS1    PCOX1    PGHS1    PTGHS    PGG/HS    PTGS1   
PGHS-1NM_0805919606COX1    COX3    PHS1    PCOX1    PGHS1    PTGHS    PGG/HS    PTGS1   
PGHS-1U1806010116

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

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Text2Knowledge ... Yong Huang 2002