Your Query returns 10 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
CTRBBC0053859606CTRB1   
CTRBNM_0019069606CTRB1   
ctrBM57677487
ctrBBX294149243090pys   
ctrBAL162752122587
CTRBM244009606
CtrbNW_04753610116
ctrBNC_003116122587
ctrBNC_005027243090pys   
CtrbNM_01253610116Ctrb1   

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

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Text2Knowledge ... Yong Huang 2002