Your Query returns 18 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Lmx1bAF4140868355
LMX1BAY2150739615
Lmx1bNM_01072510090LMX1.1    LMX1.2    602575
Lmx1bXM_34241910116
Lmx1bNW_04765210116
LMX1BAH0063109606602575
LMX1BAF0595729606602575
LMX1BAF0595739606602575
LMX1BAF0595749606602575
LMX1BAF0595759606602575
LMX1BAY4050159606602575
LMX1BAY4050169598
LMX1BAY40501710090602575
LMX1BNM_0023169606NPS1    LMX1.2    602575
Lmx1bNT_03920610090602575
Lmx1bAF07816610090602575
Lmx1bAF39007310116
LMX1BNT_0084709606602575

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

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Text2Knowledge ... Yong Huang 2002