Your search term NTN3 returns the following data from GWAS Central:
Phenotype search results:
Search term NTN3 was not recognised as a MeSH/HPO phenotype term or synonym

Gene/region search results:
2 Study Datasets reported containing markers in gene or region NTN3 (no 5′ and no 3′ flanks) with -log p ≥ 0View and refine results..
1 Marker in gene or region NTN3 with -log p ≥ 0View and refine results..
0 Texts contain the keyword NTN3 No results to viewNo results to export

Studies search results:
0 Studies contain the keyword NTN3 No results to viewNo results to export

Marker search results:
Search term NTN3 was not recognised as a marker identifier or identifiers