Among these variants were a missense variant of CYP4V2 gene (rs13146272) reported to protect from DVT [7] (allele count in DVT cases vs controls of this study: 3 vs 6), a 5'UTR-variant of FGA gene found to increase DVT risk (rs2070011) [25] (allele count in DVT cases vs controls: 12 vs 7) and a variant reported to decrease circulating VWF levels (rs216321) [26] (i.e. expected to have a protective effect since high VWF levels increase DVT risk [27]; allele count in DVT cases vs controls: 0 vs 3). This evidence concerns the gene VWF and deep vein thrombosis.