Your Query returns 4 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
HSPC004NM_1982029606RPP2    RPP20    POP5   
HSPC004NM_0159189606RPP2    RPP20    POP5   
HSPC004NM_1982019606RPP2    RPP20    POP5   
HSPC004BC0125059606RPP20    RPP2    POP5   

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

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Text2Knowledge ... Yong Huang 2002