Your Query returns 4 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
IL-1R-alphaNM_0008779606P80    IL1R    IL1RA    CD121A    D2S1473    IL1R1   
IL-1R-alphaBC0675069606IL1R    IL1RA    P80    D2S1473    CD121A    IL1R1   
IL-1R-alphaBC0675079606IL1R    IL1RA    P80    D2S1473    CD121A    IL1R1   
IL-1R-alphaBC0675089606IL1R    IL1RA    P80    D2S1473    CD121A    IL1R1   

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

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Text2Knowledge ... Yong Huang 2002