The (T;T) genotype at this position suggests an increased risk of Parkinson's Disease. The homozygote form (T;T) is more common. The other SNP that definitely relates to NSF is rs183211. rs199533 along with rs2736990 and rs393152 were cited in this gwas study regarding the risk of underlying Parkinson’s disease.
Nat Genet. 2009 December; 41(12): 1308–1312.