Your Query returns 7 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Slc22a8NM_03119410090Oat3    Roct    607581
SLC22A8BC0223879606OAT3    MGC24086    607581
SLC22A8NM_0042549606OAT3    MGC24086    607581
Slc22a8NT_03968710090607581
Slc22a8BC01476210090Oat3    607581
SLC22A8NT_0339039606607581
Slc22a8NM_03133210116OCT3    Roct   

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

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Text2Knowledge ... Yong Huang 2002