{{Rsnum
|rsid=7687945
|Chromosome=4
|Orientation=plus
|geno1=(C;C)
|geno2=(C;T)
|geno3=(T;T)
|position=89843548
|Assembly=GRCh38
|GenomeBuild=38.1
|dbSNPBuild=141
}}{{ population diversity
| geno1=(C;C)
| geno2=(C;T)
| geno3=(T;T)
| CEU | 20.5 | 54.5 | 25.0
| HCB | 3.7 | 19.1 | 77.2
| JPT | 0.0 | 14.4 | 85.6
| YRI | 7.7 | 43.4 | 49.0
| ASW | 12.3 | 42.1 | 45.6
| CHB | 3.7 | 19.1 | 77.2
| CHD | 1.8 | 18.3 | 79.8
| GIH | 22.0 | 55.0 | 23.0
| LWK | 7.4 | 52.8 | 39.8
| MEX | 15.5 | 51.7 | 32.8
| MKK | 7.1 | 39.6 | 53.2
| TSI | 26.3 | 48.5 | 25.3
| HapMapRevision=28
}}"Dissection of the genetics of Parkinson's disease identifies an additional association 5′ of [[SNCA]] and multiple associated haplotypes at 17q21" {{PMID|21044948}} suggests this is [[Parkinson's Disease]] associated together with [[rs356220]], masked in other [[GWAS]] by [[rs2736990]] via [[Simpson's paradox]]. Association replicated in French dataset with r^2 0.98 LD [[rs2301134]] substituted.

{{on chip | 23andMe v1}}
{{on chip | 23andMe v2}}
{{on chip | 23andMe v3}}
{{on chip | 23andMe v4}}
{{on chip | Illumina Human 1M}}