Rs422187

"This study, therefore, provides important confirmation of an association between factor IX levels and risk of venous thrombosis. Second, investigation of 15 tag SNPs that served as surrogates for other SNPs in the region, and 14 additional candidate SNPs, showed that only the rs422187 SNP showed a similar association with DVT (and a very strong association with factor IX Malmö).  http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2675672/