Your Query returns 14 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Pou1f1NM_00884910090dw    Hmp1    GHF-1    Pit-1    dwarf    Pit1    173110
Pou1f1BC06121310090GHF-1    Hmp1    dwarf    Pit1    173110
Pou1f1NW_04735410116
Pou1f1NM_01300810116Pit1    GHF1A    PIT1Z   
POU1F1AY4137999606173110
POU1F1AY4138009598
POU1F1AY41380110090173110
POU1F1NM_0003069606PIT1    GHF-1    173110
POU1F1NM_1745799913Pit1   
Pou1f1BC06156310116GHF1A    PIT1Z    Pit1   
Pou1f1BC06156410116GHF1A    PIT1Z    Pit1   
POU1F1G669349823
POU1F1NT_0224599606173110
POU1F1NM_2043199031

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

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Text2Knowledge ... Yong Huang 2002