Your Query returns 17 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
mdrNM_01107510090Mdr1    Pgy1    Abcb1    Mdr1b    Pgy-1    Abcb1b   
mdrAJ3440498260
mdrAB01141528214
mdrD500981423
mdrAF139107287
mdrZ99105224308
mdrAY3518445855
mdrAY3518455855
mdrX871041280
mdrX871051280
mdrAJ24345899116
mdRAL7316915085
MdrAF05590810090
mdrAF0997328078
MDRAY0534618265
mdrNC_000964224308
mdRBX6496075085

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

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Text2Knowledge ... Yong Huang 2002