Your Query returns 3 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Acvrlk1NM_00961210090Alk1    Acvrl1    601284
ACVRLK1BC0426379606ALK-1    ALK1    HHT    HHT2    ORW2    SKR3    ACVRL1    601284
ACVRLK1NM_0000209606HHT    ALK1    HHT2    ORW2    SKR3    ALK-1    ACVRL1    601284

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

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Text2Knowledge ... Yong Huang 2002