Your Query returns 4 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Calc1NM_00758710090CA    Ct    Ctn    Calc    Cgrp    CGRP1    CGRP-1    Calca    114130
CALC1NM_0017419606CT    KC    CGRP    CGRP1    CGRP-I    CALCA    114130
Calc1BC02877110090CA    Cgrp    CGRP1    CGRP-1    Calca    114130
Calc1BC03007110090CA    Cgrp    CGRP1    CGRP-1    Calca    114130

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

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Text2Knowledge ... Yong Huang 2002