Your Query returns 18 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Ntrk2NM_00874510090Tkrb    trkB    600456
Ntrk2NW_04748710116
Ntrk2NM_01273110116Tkrb    TRKB1    RATTRKB1   
NTRK2BC0318359606TRKB    600456
NTRK2AF2903039534trkB   
NTRK2AF4004419606600456
NTRK2AF4108989606600456
NTRK2AF4108999606600456
NTRK2AF4109009606600456
NTRK2AF4109019606600456
NTRK2AF4109029606600456
NTRK2AY0835769544
NTRK2AF5089649606TRKB    600456
NTRK2NM_0061809606TRKB    600456
Ntrk2NT_03958610090600456
Ntrk2AY26634610116
Ntrk2BC05201410090trkB    600456
NTRK2NT_0239359606600456

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

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Text2Knowledge ... Yong Huang 2002