Your Query returns 20 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
EdnraNM_01733310116Etb    Ednrb   
EDNRAAF4726189031
EDNRAL066229606131243
EdnraNW_04753510116
EdnraNM_01255010116Eta    ENDOR    RATENDOR   
EDNRAAY2754629606131243
EDNRAAY4229899606131243
EDNRABC0225119606ETA    ETRA    131243
EDNRAAY4178169606131243
EDNRAAY4178179598
EDNRAAY41781810090131243
EDNRANM_0019579606ETA    ETRA    131243
EDNRANM_1743089913
EdnraXM_13449910090131243
EdnraNT_03946710090131243
EdnraBC00827710090ET-AR    ETa    131243
EDNRAAF0406349031
EDNRANT_0166069606131243
EdnraNM_01033210090ETa    ET-AR    Gpcr10    131243
EDNRANM_2041199031

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

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Text2Knowledge ... Yong Huang 2002