Your search term rs1799945 returns the following data from GWAS Central:
Phenotype search results:
Search term rs1799945 was not recognised as a MeSH/HPO phenotype term or synonym

Gene/region search results:
Search term rs1799945 was not recognised as a gene or region

Studies search results:
0 Studies contain the keyword rs1799945 No results to viewNo results to export

Marker search results:
1 Marker matches identifier search for rs1799945View and refine results..